Have never gotten into D&D, only watched the movie and played NWN heh.. Rifts is the only one I've played that my interest lasted longer than a couple of weeks. Just the environment appeals to me better, prefer te sci-fi apocalypse setting.
I've GM'd a couple of games so far, mainly because the GM that usually runs our games is getting tired of the job and wants to play himself.. heh.. So I'm still learning, I'm gravitating towards giving more xp for roleplaying than anything, that seems to bring out some interesting conversations and plots..