For me its gotta be GTA3 and VC.
GTA3 had the best atmosphere imo, it was nice and dark. The city fitted the storyline perfectly. Also had some of the best missions.
GTAVC was really fun to play. The storyline was great, the city was kinda small but was fun to race around. And it was always fun to go flying in the helis

SA bores the arse off of me. Theres just something about it. The storyline was utter shit. If it wasn't for multiplayer (not sa-mp or MTA, i'm on about RUMBLE

) then i probably wouldn't have played this for very long.
IV is pretty good, but its far too buggy and runs like crap even on high end machines thanks to it being a crappy port.
The storyline in IV doesn't really grab you either.
Maybe i'm just a bit old fasioned. I still play the old GTA1 and GTA2 from time to time. Gotta love some nostalgia
