I know it's not strictly an individual stand alone game, but I really feel like they absolutely f*cking nailed the tone, characters and story of TBoGT. I liked it more than IV, and more than the older GTA's. (Except for Vice City of course) i thought the music was great, and I really enjoyed Luis's relationship with Tony. In fact it kind of bums me out we will most likely never see these characters again.
Except Henrique. He was annoying as f*ck.