True RPGs that follow the classic P&P RPG standard. Stuff like TES is good for one playthrough, but there is no reason to play after that.
I also don't mind Mass Effect Style RPGs, though the large linearity of them overall and the lack of an open world to explore (Largely in 2, though the worlds in 1 were barren and barely worth exploring) downgrades them a bit. Sadly, even though they are more linear than Skyrim and the likes, they have more replay value in them (Go Renegade Female instead of Paragon male. In Skyrim, you can do it all in one playthrough, though siding with the Empire or Stormcloaks will require 1 save to get both done, even though almost nothing changes afterwords).
That or RTS or 4X. Love me those games.