Think back, what's the last game you played that didn't have a shitty boss fight? 

There's games like God of War 3 that have good boss fights (I thought Hades was fucking awesome, there's some other great ones in there, too) but not all are that fantastic.  There's games like Uncharted 2, Batman:AA that, for whatever reason, still think they need a "final boss" to end a game just because that's the way games have worked for a long time and if they don't have a final boss there somehow not doing what they should, even if that "final boss" is complete shit. Does anyone remember that stupid train boss in UC2? That was not fucking necessary, and was one of the worst video game decisions ever.  I can't remember for sure, but I think I remember getting pissed off at some Infamous bosses. Some just have retardedly repetitve boss fights, like Batman or Resident Evil 5. 
 
I think boss fights are slowly getting worse and worse as time goes on. I've never felt that hack n' slashes in general were good things to have bosses. God of War definitely has it's moments, but there's also a lot of disappointing and anticlimactic boss fights in them, too. The only type of games where I know bosses will still be great are 2D ones.  
 
So, I think, instead of cramming so many boss fights into one game like many devs do, just take your time and make a really good boss fights that works well with the mechanics of your game, and if you can't make a good boss fight, DON'T MAKE ONE. And for the love of God, not every games needs to have a final boss. 

So, to answer my question at the beginning, I guess I'd have to say Metal Gear Solid 4, then maybe Super Mario Galaxy. 
 
Also... agree, disagree?