For me its Bioware games, but not like late 90s, early aughts stuff, the mass effect, dragon age stuff. I can play them over and over again forever. I never get bored despite knowing everything. Well wait I kinda had problems with Andromeda but I may go back to that one too.
So despite living through the 80s, 90s, my drug of choice is a very specific era of Bioware.