X World of warcraft (The main MMORPG, a lot of whiners and a high cost, but a fun game all in all)
X Warhammer online (Cool enviroments, a bit more mature than WoW)
X Guild Wars (One of my personal favourites, though a bit short)
X Pristontale (One of the first I ever played, fun and free 'til highlevel)
Silkroad Online (Never really caught my attention)
ROSE online (Same as Silkroad, not interesting enough)
X Fiesta (Cute graphics, average gameplay)
X Cabal online (One of the better free MMORPGS available if you ask me, a bit boring with the skill-system though)
Entropia Universe (Boring and slow, though it is said that you can earn real money in this game)
Perfect World (Yay, another mediocre mmorpg)
Dreamlords (Strategy-mmorpg, new idea, never really understood the gameplay, hard to learn!)
X Tales of Pirates (Another "cute" game, with pirates and your own ships, otherwise it's still just a mmorpg in the pile)
Rappelz (Neat graphics, boring gameplay though)
X Dekaron (Fun if you find a guild, cool skills, average gameplay)
X FlyFF (Boring in low-lvl, gets a bit more exciting at endgame, if you got the patience to get there)
X marks the spot, where I leveled at least to 20% of maxlvl
If you want a good mmorpg to try out, I'd recommend a P2P as WoW or WAR, if you are looking for a free, I'd recommend Cabal Online
(I'll add all the URL:s soon)