NWN - 1
NWN - 2 (Never played Baldurs gate or Icewind Dale as of yet)
Morrowind
Does Deus Ex count?
Two Worlds Just kidding
Oblivion (somewhat, Morrowind still kicks its ass)
Kotor 1/2
Jade Empire is decent
Fable 1 (haven't played 2 and I'm in no rush either)
All Final Fantasy games as far as 8, after that its just...
The Witcher
Fallout 1/2/3(Not bad, but boring after 2 hours)
Pirates of the Caribbean (Sea Dogs 2)
Vampire - The Masquerade:Bloodlines
Phantasy Star Universe
And one of my all time favourites (Not sure if it counts as a RPG)
X-Com Terror from the deep