It's hard for me to pick one so I'll name a few.
Mass Effect Franchise.
Zelda Franchise.
Assassins Creed Franchise.
Minecraft
Call of Duty Franchise.
Lots of Nintendo games, too many I can't name. I own tons of Nintendo games but find almost all to be overrated.
Dragon Quest Franchise.
LittleBigPlanet Franchise.
Watchdogs
I'd be here all day naming them