I've played a few free MMOs here and there but I honestly can't remember the names of any of them. I remember one I was a catgirl dancer and your race determined your class... it was cute though. And the music was nice. :P

Otherwise I played DDO, which was amazingly fun, I just loved everything about that game. Even in the endgame you could play the beginning content and have a blast doing it. Good times all around.

I also played White Knight Chronicles 1 and 2 if those count lol. Kind of an interesting model that the whole game was single player and then the entire endgame was like MMO-lite. Hahaha.

Edited to add, totally forgot I played PSO and PS:P. Loved those games too!