Without a doubt Gran Turismo 4. I still play it on the Emulator from time to time. Edit- San Andreas and Vice City to of course.
I am honestly not sure for me, GTA for sure that was always fun messing around with cheats, also it was at a friends house not my own house, because my house its all Xbox and stuff here
I am not able to chose one out of all of these. I'd add test drive eve of destruction as well but don't own it as its hard to get a copy cheap :L I don't buy some quite popular games as they norm have quite a good pc version.
Road Trip Simpson's Road Rage & Hit and Run NASCAR 2007 GTA SA NASCAR Dirt to Daytona Sprint Cars 2 Showdown to Eldora Tony Hawks American Wasteland
Can't decide 'The Best' out of these 5 Driven to Destruction (Test Drive Eve of Destruction) Driv3r The Getaway Taito Legends - More specifically 'Elevator Action' Midnight Club 3 DUB Edition Remix
NFSU 1 and 2, and MW GT4 TXR Drift 2, dispite wanting way too much out of a dualshock2 gamepad, is still one of my favourites MC3 And probably GTA SA
I have quite a nice list ^^ I will put on bold some game i don't see quite often : Enthusia, Colin McRae 2005, Gran Turissmo 4, Burnout 3, Flatout 2 and Test Drive Unlimited 1 (Yes it was on PS2 ...) Midnight Club 3 DUB Edition Remix NFSU2, NFS MW and NFS Carbon (Just for the Autosculpt) GTA:San Andreas of course ! And the Simpson Hit'n Run ^^ Killzone 1 and 2, Black and Sniper Elite V1 Ford Racing 3, Test Drive Offroad Wide Open and a mountain bike game ... Jack and Daxter series, Ratchet and Clank series (the 3rd is my favorite) The Tony hawk's pro skating games A Wallace and Gromit game too and a Crash Bandicoot game with two characters in the same vehicle Eye toy compilation and ... well ... Titeuf la méga compil' ... I've played quite a lot of game on my PS2 ... Hopefully I had a 64Meg Memory Card !