For me GTA3 makes me the most nostalgic, the vibe/atmosphere of that game was something else. shyt was so dark and gritty, IMO it also had by far the best radio stations...
Game FM
GOAT GTA Hip Hop radio station, not even a contest.
MSX FM
I'm from the UK and pirate radio/underground music(jungle, DnB, Garage etc.) was a big part of my come up so this was just
Chatterbox FM
By FAR the FUNNIEST chat radio station in GTA, shyt has me in tears every single time
Don't get me started on the NPC comments "My mothers my sister!"
But on the other hand SA was just an epic experience, before V came out they marketed it as "The big one" but really and truly "The big one" was always San Andreas. From gang banging in the hood to running around the countryside doing all those robberies, becoming an entrepreneur and triad associate in SF, working with shady government agents in the desert, running a casino and robbing the mafia in LV, to finally coming back to the hood and restoring order and then all the shyt you could do in between, shyt was just
all the way through.