I used to play Tibia, free MMORPG with more areas/spells/other stuff for those that want to subscribe. What I like about it back when I played was that your skills were directly proportional to the amount of time spent working on them or using a weapon of that type (swords, axes, clubs, fists, distance, magic, shielding) so you could level up really fast but have a weak char or work on your skills and have an almost unbeatable low level char.
Games I currently play:
Kingdom of Loathing, text based RPG that makes fun of everything.
Darkthrone - TBG, attack people for gold, gain levels gain access to different weapons
Infantry - Old school game, lots of different zones with different settings, something for everyone.