I used to enjoy World of Warcraft for a spell, but then I decided that sleep was probably more important. Plus I don't really feel like I got the most out of it. Due to not being on at a regular time, I generally found it hard to join up with a regular group, and the few times I did quest with people it was obvious that when I was just solo-ing I was missing out on what was one of the best aspects of the game.
I couldn't imagine sitting at my PC playing an MMORPG anymore, but lying on my couch playing one on the PS3, now that's a different story.
Although I probably shouldn't I'm contemplating giving DCU Online a shot. The reviews seem to be pretty decent, and superheroes are more my thing than orcs and midgets. Although its monthly fee is a bit expensive.
If they had followed the guild wars model, i'd think i'd have bought it. From what i heard endgame's pretty sparse as well. Otherwise it seems an enjoyable distraction until rift comes out XD.
i'm a bit wary getting into games based on big IPs (that were not originally games themselves) eg. Lotro. It felt to me that whatever i did never seemed to be as epic as the main heroes(Fellowship). Maybe that's just me though.