#1
My personal favorite is definitely Vice City because of the setting, music and story.

As for the best, it has to be San Andreas for it’s length, map, voice acting, features like car modifications, gym, restaurants, casino, jobs and sheer amount of things. I’d say the only game that comes close to it would be GTA V but it doesn’t feel as big and fun.

Most underrated is Vice City Stories. It’s fun, the business are well done, the story is pretty good, Phil Collins’ in it and the graphics are quite good on PS2/remasters.