As soon as they made you work out to stay in shape I stopped playing. I will work out in real life to stay in shape, but for my character in a video game? That is just dumb.
The best GTA was the original top scrollers, and GTA II for PS2. After that the game just recycles content and the story is lame. The driving in GTA IV is dumb, the graphics aren't that great. The physics are way off, the story sucks, and the combat is way too simple.
They also totally ripped off of scar face, and I mean come on, how original is that?