DDO is kind of fun. I have a few characters on there.
It's free, with the option to purchase things. Like certain races or classes. You can, however, earn the credits to do that from quests.
Mabinogi is nice. Lots of clothing options. I like the graphics myself. It offers a classless system. Lots of ways to play. Elements of strategy in a rock-paper-scissors way.
DC Universe seems sort of amusing. I made a few characters on it once I realized wall-crawling was one of the means of transportation.
Eden Eternal, as a mentioned before, is fun. Lots of classes, and the ability to easily play as all of them.
“She'd become a governess. It was one of the few jobs a known lady could do. And she'd taken to it well. She'd sworn that if she did indeed ever find herself dancing on rooftops with chimney sweeps she'd beat herself to death with her own umbrella.”
― Hogfather