I like bosses and I really liked the final boss battle, I should say, in DA2 because for 50 hours I passed by those statues many, many times and I even took a few screenshots. I thought the battle was really cool. 
 
I'm all for boss battles especially when done well.

I'm not a fan of boss battles.  But I DID like the bosses at the end of Dragon Age 2.  I think it made it feel more epic. Sorry you didn't like them.

It depends on the type of game you're playing. Halo 2 proved that a boss battle in an FPS is just lame but as far as RPGs go they're more appropriate as they're a great way of testing your character's experience level and skills you've taught your character(s). The only game I ever truly loved boss battles is Shadow of the Colossus for obvious reasons. 

Great boss battles: Bayonetta, SMT3: Nocturne, Nier

Shadow of the Colossus, Demon's Souls, Casltevania, Zelda, Ninja Gaiden, almost every decent character action game ever. 
 
A bunch of shit I'm forgetting. 
 
Like RPGs.
 
Bosses are awesome because the game designer gets to take everything they've taught you as you've been playing and focus it into a single overwhelming obstacle that you have to use your cunning and skill to overcome. It's like the final test for both the player and designer. The training wheels get kicked the fuck off and all you have to fall back on is what you've learned.  It's fucking huge and exhilarating and challenging andgreat.
 
All the bosses in DA2 are terrible. They are like bad WoW elites but fucking boring and exploitable as hell. 
 
At least the bosses in DA1 were, like, passable WoW bosses. And you could fire trebuchets at them.    

I generally like boss battles, for certain genres, and DA2 being an RPG should of been one of them. Unfortunately, with it branching towards more hack n slash elements, with more focus on placements and cover, rather than dice rolls, it made some of the battles incredibly boring and cumbersome to manage. The giant rock wraith was the worst, with me having to constantly manually move my party around. The duel against the Arishok was pretty lame as well. 
The High Dragon as well, was mostly just me running in circles with the tank of the team, luring the Dragon around, while the rest would chip away at its health.

It depends on the type of game. In a lot of shooters and some RPGs, bosses can be a huge bummer; they often aren't fun to fight or represent a huge difficulty roadblock. Uncharted 2, for example, had absolutely horrible boss fights. 
 
For games with good boss fights, Shadow of the Colossus is an obvious choice. Also try Bayonetta, any game in the God of War series, and some of the games in the Contra series, especially Contra III, Shattered Soldier, and Contra Hard Corps.

I liked the boss battles of DA2. Actually most of my favorite games feature gameplay heavily focused on boss battles such as FFXIII, Bayonetta and Monster Hunter. 
 
If they got rid of bosses in video games... I think I'd be playing significantly fewer games.

" Shadow of the Colossus, Demon's Souls, Casltevania, Zelda, Ninja Gaiden, almost every decent character action game ever. 
 
A bunch of shit I'm forgetting. 
 
Like RPGs.
 
Bosses are awesome because the game designer gets to take everything they've taught you as you've been playing and focus it into a single overwhelming obstacle that you have to use your cunning and skill to overcome. It's like the final test for both the player and designer. The training wheels get kicked the fuck off and all you have to fall back on is what you've learned.  It's fucking huge and exhilarating and challenging andgreat. All the bosses in DA2 are terrible. They are like bad WoW elites but fucking boring and exploitable as hell.  At least the bosses in DA1 were, like, passable WoW bosses. And you could fire trebuchets at them.     "

" This, basically. With the exception of the high dragon, I think the worst thing about DA2 bosses was how easy it was to freeze them for extended periods of time. "

Yes, we need boss battles.  Just because there are some bad bosses doesn't mean we should get rid of them entirely.  That's just throwing the proverbial baby out with the bath water.

"Yes, we need boss battles.  Just because there are some bad bosses doesn't mean we should get rid of them entirely.  That's just throwing the proverbial baby out with the bath water. "

" The last boss of Bioshock still pisses me off. The whole fight just seemed like a lazy and predictable way of ending the game. "

" I just recently finished dragon age 2 for ps3 and was happy with the game overall but the end bosses of dragon age 2 were one of the downfalls of the game. Many games do this but few can do it well enough that it is enjoyable and not repetitive. Bosses are usually a climatic way for games to conclude the chapter of the campaign but alot of the time they prove to be annoying and repetitive.   I believe we should get rid of boss battles in video games because they slow down the pace of a game and they ruin te experience that the game spent so long building up through its earlier parts. I would prefer to have a giant firefight where i were to take down a bunch of enemies in  a bunch of different ways then to fight one giant boss repeatedly using a single strategy that exploits the boss.   I only speak about boss battles through my experience, you may have encountered a game where the boss was actually a challenging and enjoyable part of the game and if thats the case, tell me what game it is so i can give it a look and maybe my stance on bosses may change. If you are like me and dislike boss battles, tell me why and what boss battle made you decide that enough was enough. "

My favourite boss battles were from the Metal Gear Solid franchise. Every one of them was completely different from one another and force you to use different strategies.

Go and ask Sweep

Spoiler for Dragon Age 2: 
 

 
I agree, there's that one early boss where after beat on them for a couple minutes your supposed to hide behind a piller to avoid it's massive attack.  There's also another one where the only strategy for defeating it is hit-n-run attacks while trying to doge the boss' attacks. 

To me boss battles felt really archaic ten years ago and I can't believe they're still a "thing" in so many games.  
 
I mean there are certainly games where boss battles feel appropriate, and I want them to remain in such games, but with more and more games they just feel incredibly out of place.  
 
In case I didn't say "games" enough that post: gamesgamesgamesgamesgames. 

" Shadow of the Colossus, Demon's Souls, Casltevania, Zelda, Ninja Gaiden, almost every decent character action game ever. 
 
A bunch of shit I'm forgetting. 
 
Like RPGs.
 
Bosses are awesome because the game designer gets to take everything they've taught you as you've been playing and focus it into a single overwhelming obstacle that you have to use your cunning and skill to overcome. It's like the final test for both the player and designer. The training wheels get kicked the fuck off and all you have to fall back on is what you've learned.  It's fucking huge and exhilarating and challenging andgreat. All the bosses in DA2 are terrible. They are like bad WoW elites but fucking boring and exploitable as hell.  At least the bosses in DA1 were, like, passable WoW bosses. And you could fire trebuchets at them.     "

" Yes, we need boss battles.  Just because there are some bad bosses doesn't mean we should get rid of them entirely.  That's just throwing the proverbial baby out with the bath water. "

Depends on the game, I'd rather have an elaborate cutscene then a boss fight most of the time.  And when there are boss fights I prefer them to be puzzle based, one on one, or essentially a normal fight against an opponent with higher resistances and damage.  I find it frusterating to no end whenever 1/5 of their health bar is knocked away, they [insert method of escape] to a place you cant reach them, and throw waves of mobs at you until they eventually rejoin the fight, only for this tedious process to repeat again 4 more times.

Not all video games need boss battles, but getting rid of boss battles altogether? Fuck that. If boss-battles are well-designed, they're usually the highlights of the game they're in.