starcraft! not an rpg, but you can get addicted easily.
and dota! More of an rpg game, except no storylines, and you play against each other. I definetly think you should try dota. Seems like your downloading yoru games so i can give you a torrent link and tellyou how to play with other people not using bnet. Dota is probably the longest game i've played. Even though i sometimes take breaks from it.

DoTA is a strategy game. I used to play it, but it's not fun unless it's multiplayer.

Eh, I knew some people who hated the game, but I knew quite a bit more who loved it, though. I do agree with you on how DE2 was a big letdown, but I guess it's worth a once around if you liked the first one.