You didn't have to make a poll for this because the other guy didn't. That's duplicating threads.

FO3

Oblivion. Significantly less jank plus significantly less wandering around equals a better experience.

Fallout 3. Mainly beacause of the perks system which allowed for a more enjoyable experience than Oblivion.

Fallout 3.

Oblivion... I lived in that game for a long long time. I only played Fallout 3.

Fallout 3 would be the better choice here for me personally, Oblivion bored me to tears while Fallout 3 is one of my most played games of all time =)

Fallout 3 is a good game, but it ain't got nothing on Oblivion. 

Oblivion.  I never got into Fallout 3 as it didn't seem RPG enough for my tastes.

Fallout 3. It felt far more immersive

i loved the perk system but felt it needed more variation 

" Oblivion... I lived in that game for a long long time. I only played Fallout 3. "

" @Claude said:

" Oblivion... I lived in that game for a long long time. I only played Fallout 3. "

LOL I love u <3 not in a gay way, but u are so full of wisdom "

Fallout 3 is more innovative IMHO. The use of perks, radiation poisoning, crippled limbs are all pretty cool. But the art design is what stands out. I have both and beat Oblivion. Currently working through Fallout 3, and because of what I mentioned, I'm liking it a bit more.

" @lolicanseeyou said:

" @Claude said:

" Oblivion... I lived in that game for a long long time. I only played Fallout 3. "

LOL I love u <3 not in a gay way, but u are so full of wisdom "

I'm not so sure. I played Oblivion on my PC and Fallout 3 on my Xbox 360. Who knows? Maybe I would have liked Fallout 3 better on the PC. Maybe another poll is in order. Did you play Fallout 3 on a console or pc? "

Fallout 3. Despite about three different attempts to get into Oblivion (two on console and one on PC) I just had a horrible time with it for some reason. When I started Fallout 3 my hopes weren't high after my experience with Oblivion but I absolutely loved Fallout 3 and am still playing it today.

Oblivion, more colorful and a better world to just be in.

I chose Fallout 3 but they are both AMAZING games. You must play them both.

I only chose Fallout 3 because it's the only one I've played :D 
 
Will get into Oblivion once I'm finished with Orange Box though!

" Fallout 3. Mainly beacause of the perks system which allowed for a more enjoyable experience than Oblivion. "

i haven't played oblivion nearly as much as fallout 3, but i like the setting of fallout a lot more, so with that i'll have to go with fallout 3

I had a horrible experience with the PS3 version of Oblivion, so much DLC missed. So I choose Fallout 3.

Oh no FO3 is winning? Oblivion!

oblivion here's why. the leveling system is way better, more diverse environments (although i do like the fallout wasteland), interchangable clothing and armor sets like assigning specifice types of gloves or boots to the character, and swords magic and bow and arrows are just cooler. I still play both but i play oblivion all the time

I liked Oblivion a lot more. I just could not enjoy Fallout 3.

Oblivion...I'm a big fan of the game world...Fallout 3 is great too, but Oblivion has a special place IN MY HEART

I tried to play Oblivion when it first came out and I tried to play it again about a year ago. I'm going to assume that I was playing it wrong, but I would just be murdered repeatedly over and over again. I could not make any progress through the game and it did get a bit frustrating. Fallout 3 was awesome though. I finished the game pretty easily (navigating through the subway system in Washington DC proper was annoying though) and running around with Fawkes made the side missions a lot of fun. Fallout 3 easily takes this competition.

Morrowind. But since it's not there, Oblivion. 
 
I hate level caps. Plus, it feel like more of an RPG whereas the everyday things you do contribute to gaining XP in a certain skill. I like that system more than simply, hey you gained a level! pick some new skills. 
 
IE, I love running and swimming to gain athletics over time, jumping to gain acrobatics, lockpick enough to gain lockpicking, etc. In Fallout 3 you can get a high Lockpicking without even touching a lock. Doesn't make any sense to me but whatever :P

I think Fallout 3 was a better game but I had more fun and spent more time with Oblivion

While I love both games, I'm gonna have to go with Fallout 3 because it had a leveling system that didn't make me want to kill myself.

I think the combat in Oblivion felt a lot better than Fallout 3's. That made a huge difference in my enjoyment of the games.

Dearest OP, you seem to have made a mistake and have failed to put Morrowind in this poll. I just thought I'd point out this mistake out so you can remedy this, to not make you look a fool. 
 

Fallout. Oblivion's skill and leveling systems agitated me to the point that I just stopped playing.

" @SeriouslyNow: Suprised I even have to answer that. There is much more variety in the perks system, assuming you've played Fallout 3, you probably know this already. Oblivion is a great game and I pumped over 100 hours into that, but the bonuses of classes do not compare to the perks system in Fallout 3. I'd rather not discuss this further. Thanks! "

REALLY tough one. Im going to have to say Fallout barely edges out Oblivion due to the better leveling system and combat.

I love both of the games. i said oblivion just because i have been playing it longer and have more history with it. fallout 3 is also one of the best games ever though. Good Job Bethesda.

Easily  Fallout 3

Fallout 3, however when you play for 80 to 100 hours Oblivion's lush nature was more pleasant than Fallout's continual wasteland (i know it's the point of the game, i'm not dumb). Fallout's wasteland is better/more interesting at first. They both have their own strengths and weaknesses in terms of their worlds. I love how in both games I can be 30 hours in and discover gameplay mechanics that I was previously unaware of.

just get both. oblivion is like 10 bucks used now. and its just as good.

Well, Oblivion was better for the time it was released. Fallout 3 was garbage from day one.

Fallout 3 was more fun.

Oblivion totally and completely.

Fallout 3 (but just by a hair)