The only one I was really salivating over was Vice City. In my opinion that was the best one. Best cast of characters and storylines, as well as the best music. San Andreas was just like an overload of stuff. I know it sounds weird, but the experience system wasn't that great in my opinion, and a lot of the other side stuff seemed like it was just thrown in for quantity's sake. Don't get me wrong, SA was a good game. Just to me VC was the best mix of everything. We'll see how this new one is.
I loved all three. Strangely enough, it was Grand Theft Auto 3 that was my reason for purchasing a new system. Honestly, I would say my favorite was Grand Theft Auto 3. I never purchased another game for my Playstation 2 until I purchased Vice City (and then Madden) around two years later. I loved the missions with the mafia and thought the music was great. Still, I love the 80's music and style so Vice City was really up my alley, too. I'm expecting this new one to be something special.