Best GTA Game ?

I played all of them. Even the GTA London. I have more good memories on San Andreas so i'll pick it, cool story, and some RPG stuff with the stats with the cheatcodes and mods it was going crazy. GTA 4 had an interesting story line, but the lack of wild environment kinda fucked it up for me. GTA V has a great story mode and a very cool map. I really hope one day they'll add more "RPG" stuff, and not minimal ones during the main story and not on the online. Feel like they only did the minimum with buying businesses and having a repetitive mission every now and there just to increase or to avoid losing the income.