I keep rewatching GTA V clips and reading articles... I've been doing the same thing for BF4. I'm getting really excited about the PS4 (Flame away, disappointed with Microsoft), and equally as excited (if not more) for GTA V. Obviously the graphics are stunning, but it promises to be the best game of the generation.
GTA3 is still my favorite GTA (I know, rare opinion... a lot of it has to do with nostalgia), but GTA V. Yeah. What am I NOT excited to do in it? Single player should be ridiculously fun, the multiplayer will no doubt be improved, the city itself looks WAY more vibrant than GTA IV did, and I plan on playing the absolute eff out of it.