My significant other has played RPGs since Baulder's Gate.
Her favorite console game is Fable II&III - she played Fable II over and over and over and over and over and over and over....and over.
She's started playing WoW again with the launch of Cataclysm with me, as a goblin priest, and we finally were running a dungeon (more for a quest item than to run a dungeon...she's not big on grouping with other people) and the healer DC'd. So the tank asked her if she'd heal, and she did with some trepidation.
She absolutely loved it. She's played a hunter on and off since TBC launched, but now she is all about running dungeons (I've since leveled up a tank to the early 20s so we can complement one another better), and is asking me to hop on so she has a tank to heal - it's quite fun, but if she wasn't a gamer that'd be A.O.K. with me too. Gaming is a wonderful shared hobby, but there's so much more to a healthy relationship.