Can't stand either much.
Had a go at WoW and Guild Wars, neither kept me on the server for more than an hour. I got bored pretty quickly. Likewise with FPSs, the first one I finished was Halo and after that, I never bothered finishing them. Sure, they look pretty but I need some better motivation to go around shooting people...
Hmm, that doesn't quote work. I need more motivation to sit down and repetitively shoot people. IE: something like a plot maybe that interests me.
Also, I can be pretty picky. I'm not too attached to being a male protagonist. Simply because most games have a female romance that I'm not too keen on, or some sory of suggestive dialogue that is plain weird (for me). Also, I can relate to a male protagonist or games designed with only a male gamer in mind.
Love RPGs, RTSs (turn based or otherwise), Adventures (point and click!), puzzle (no protagonist whatsoever! Or plot! But usually a good soundtrack.. heh, Lumines. Sometimes totally pointless games do work...).
Thus, Lumines and Neverwinter Nights remain my most played and loved games. Halo is at the bottom of a pile somewhere and the MMORPs all belong to my brother. Though some upcoming FPSs look actually pretty interesting... So, FPS for me because out of the two, that's the most likely you'll find me playing.