I've played nearly every MMORPG up to FFXIV. That was where I finally decided "screw it." I simply don't have the time to keep up with any of those games, and honestly, no MMORPG is ever as good as it was when you first start it, because once you start caring about leveling up and gear and stats instead of exploring the beauty of the world and the story and meeting new friends, the magic of what makes MMORPGs great completely dissipates.
Plus, I go to MIT now, so I just don't have any time.
I play a handful of games; Runescape (Gotta love the old-feel to it), Maple Story (First look, you think it's just a cutesy game, but it can be really hardcore), Legend of Queen Opala (hehehe, it's not an MMO but still fun), and EVE Online (I'm Gallente). My current system stats cannot handle WoW and STO, but I've seen them played and they look fun.
I used to play a lot of MMORPGs when I was younger but I never do anymore. list of what I remember: Runescape, ROSE online, Maplestory, Silkroad Online, Mabinogi, La Tale, Trickster Online, Audition, S4 League
<.< Definitely in addict status now, though I'm always able to put it aside when real life has anything to do. Played Everquest back in the day, a couple months of Everquest 2, and a dozen lil freebie MMO's along the way. Then Warcraft came along, and I've been pretty hardcore on it since. Enough various content, interactions with folk, stories, characters... and a constantly improving game as a whole to keep me interested.