I really liked the PS2 games, so I thought the Xbox 360 sequel would be pretty sweet.
It's by no means a "bad game", but I just hate how dissapointing it was to me. I didn't like the "new" liberty city, the story was uninteresting, characters were stupid, and I didn't like the changes to the combat or driving.
Plus the massive rampages weren't that fun anymore. Really the first GTA I played that I didn't enjoy countless hours with.