My personal fave is either vice city or San Andreas. Hard to choose. I sit here and think about it I lean more towards Sam Andreas mainly because of how big and open the world became with GTA. Vice city I liked because of the aesthetic of the era but San Andreas was huge when it came out and a big part of my teen years. Spent many hours on that game. Can't wait for GTA VI to hit it's gonna be epic. Side not 5 was a killer game also. Definitely #2