Let me add my list that's going to change in 10 days!
- Ultima VI - IV comes in at a close second, I just liked VI's story more.
- Ultima IV - It's practically the same as VI except shorter and I didn't like the story as much.
- Wasteland - Great RPG, if you can get over the bugs and terrible interface (even for its time).
- Fallout - Because not even its sequel managed to balance everything like this one.
- Icewind Dale - I don't know about you, but an RPG without a good combat system isn't an RPG in my opinion, and Icewind Dale was awesome.