um, depends. if you dont mind putting up with a 'just released' game, then aoc is pretty fun. its much more casual than wow is. you level much quicker. but, i'm not sure how much content there is. there's a lot of complaints about the lack of high level content, right now. its a fun game though. im enjoying it right now.
if you ask me, wow is old, and has been old and repetitive for about a year, now. i dont know about any other games right now, on pc, but id suggest giving aoc a chance if your rig can handle it.