Looking good, I also don't think you should go with the Light Armor skill if you want to be fully Mage, use up them robes!

If you can make it to the Mage Academy in the Imperial City, you can always just forget about armor altogether and throw some shield enchantments on a normal set of clothing.  Even just using petty or lesser souls you'll end up with a pretty decent armor rating, and it won't make your spells less effective like wearing armor would.

Strength doesn't increase your health, endurance does. Strength increases your melee damage, and effects how much you can carry. You shouldn't worry too much about having mage specific skills as your major skills. Honestly you can build a character that is competent at everything. Your minor skills can become an important factor in balancing out your character, so having a few minor mage skills can be beneficial. You can increase them all to maximum in the end, minor or major. You really should only have one major skill for each attribute (Strength, Endurance, Intelligence, Willpower, Agility, Acrobatics), but you can play however you like. If you want to stick to mage specific skills, try to mix it up. Have a few that increase intelligence and a few that increase willpower. And, conjuration is a good skill not just for combat (Capturing souls). It also is the easiest way to gather Intelligence attribute points.

If I read this thread any more I might have to actually bust out my old copy of this game and play it again... damn you guys! lol

Alchemy's actual functionality is limited if you have a high Restoration skill, but I'd recommend it because you don't have unlimited Magicka and you could use a good potion in tight spots.  Also, it's an easy skill to level up if you're willing to constantly carry the necessary tools on your person and often scrounge around for ingredients.  When you have a high level Alchemy ability, you'll be rich because you'll be able to make awesome potions with common ingredients and sell them at a high price.

How could you not want Alchemy? It's the best skill in the whole damn game - a perfect jack-of-all-trades skill. Just get into the forest and get foraging. And if you're making a Mage character, I suggest collecting ingredients in the West Weald (between Skingrad and Kvatch), where TONS of Flax plants grow, and Flax seeds has the following four properties: Restore Magicka, Shield, Feather, Damage Health. Pick enough Flax Seeds, find ingredients to mix with them, and all of a sudden magic regeneration, damage protection and encumberance are no longer concerns, and Damage Health is always useful, right?

" If I read this thread any more I might have to actually bust out my old copy of this game and play it again... damn you guys! lol "

" @FluxWaveZ: Ok, so if I had Alchemy,Restoration,Alteration,Mysticism,Destruction,and Illusion, which should be my 7th main skill?: Conjuration or Blade? "

I would say no to alchemy.  If you want a pure mage you will have low strength and thus wont be able to carry a lot of mushrooms and pumpkins, unless you want to be constantly casting feather on yourself. All your potion needs will be met by the shit you find in the world.

" I would say no to alchemy.  If you want a pure mage you will have low strength and thus wont be able to carry a lot of mushrooms and pumpkins, unless you want to be constantly casting feather on yourself. All your potion needs will be met by the shit you find in the world. "

I love how nerdy this thread is.  It makes me want to play some more Elder Scrolls.

Actually, I've been thinking more about this, and here's the important question: do you want to min-max the game or do you want to actually have a more natural experience? If you want to build the most brutal character who can handle any Daedra lord, then my best advice is pick skills that level up slowly by nature - Restoration levels up very slowly, but if you are a Mage specialist and choose it as a Major it goes up MUCH faster.
 
You can break all skills down into three categories: Fast, Normal and Slow increasing.
 
Fast increasing skills include Alchemy, Armorer, Illusion, Alteration, Conjuration, Mysticism and Blade
Normal increasing skills include Destruction, Marksman, both armour skills, Sneak, Blunt and Security
Slow increasing skills include Restoration, Acrobatics, Mercantile, Athletics, Hand-to-hand, Speechcraft and Block
 
The balance here is that if you choose too many skills that increase slowly, or dud skills, you will become completely gimped and levelling up will be a real pain. But if you level up too quickly then later game opponents will be brutally tough because you need to be increasing all your skills to earn enough attribute points to level up your character properly. If you go Alc/Res/Alt/Mys/Des/Ill, you have a lot of fast increasing skills there. The other thing is that you have all three Willpower related skills in that build - don't get me wrong, Willpower is great for a mage build, but that by itself is never enough. I'd recommend swapping Alchemy for Conjuration and Alteration for Blade, because then you'll have much more firepower and you can still level up Alchemy quickly - it's probably the best support skill in the whole game. And for a seventh skill...I'd recommend having a skill tied to the Endurance skill, because higher Endurance gives you more health and more health is always useful. If you're not planning on wearing Heavy Armor, you can still use Armorer to repair your weapons, and if you're wearing Light Armor you can also repair that. Block is only useful if your combat strategy is to stand your ground and hit them with swords and spells. If you want to move around a lot, you could even go for an Agility or Speed related skill like Light Armor, Athletics (great for managing fatigue levels) or Sneak.
 
The most important thing to remember about Oblivion's levelling system is that this is not Dragon Age. You try and make a one-dimensional super focused character, you will die. A good Oblivion character needs to be able to do everything - focus on your main skills while continuing to develop your support skills. Some skills aren't good for support skills - if you're using Blade as your main combat weapon, there's not much point in focusing on Blunt as well. Also if you've got distance Destruction skills or instead to stand up close with Block, you probably don't need to bother with Marksman, and if you're super pumped up with Illusion power, Mercantile and Speechcraft become pretty much obsolete.
 
God, I have played WAAAY too much Oblivion. This game is just like a science to me. I did NO research to write this post; everything written is from the top of my head.
 
If you want to actually have pure role-playing fun, then completely ignore me and go nuts - but just don't touch the difficulty settings.

be an assassin, much better, creep around one hit dudes with poison arrows, steal peoples shit, kill, kill, kill. Oh god, I need to play more oblivion. DAMN YOU!!!!

Yes, playing naturally should be fine. You said it yourself earlier, when you tried to spam you ended up with 300 makica and 70 health. That's not ideal. You see the enemies also become stronger when you level up, and spamming skills (ESPECIALLY MAJOR SKILLS DON'T DO) will throw your character out of wack with the enemies that leveled up with you. I guess spamming minor skills is alright, but you still shouldn't do it too much.

You're not a mage if you don't have 99 conjuration

Why not 100? But yeah, besides illusion and destruction, conjuration is my favorite mage skill. You can summon a monster and capture its soul whenever necessary. The Storm Atronach is amazing in battle too. And for earlier levels I liked using Clannfears. They're fast and relentless.

One more piece of advice; have a much money as possible - loot dungeons, do quests and utilise the financial benefits of Alchemy - and make a note of where all the skill trainers are. It's the best way to level up in a balanced way. If you're focused on certain skills but don't want to just camp-and-spam as I call it then a trainer can really help you out; providing you have the coin, five skill increases per level can really make the difference between a capable mage and a totally unstoppable badass. And as I said before, if you're using the Trainers route, make sure to train up skills that don't progress very quickly by themselves e.g. NEVER use a skill trainer for Alchemy, but Resoration and Destruction levelling is very useful.
 
And since you said that you wanted a wildly different experience, I would like to reiterate that an Atronach birthsign is a great way to experience something new in the game; not regenerating magicka makes a HUGE difference, but there are ways that you can use it to an incredible advantage. Find enchanted armor that gives +50% to spell absorption and all of a sudden you are not only completely invulnerable to magic but every spell cast on you regenerates your magicka. It's a ton of fun.
 
My problem with Oblivion is that I've played it too much and am now SUPER hardcore about levelling, which actually if you obsess over it can stop you enjoying the game. There is a balance to strike, levelling sensibly without obsessing over it. Don't camp-and-spam if you can avoid it, because it will become soul destroying.