[Quiet Man Cometh]

Eden Eternal is the only MMO I've ever played. DK got me into it. ;). It's cutesy at first, and the quests are pretty much the same sort of thing all the time - got fetch x things, go kill x things, go do x at y, got talk to this person, etc. Fairly big crowd though, and it has a guild system. It's free, but you can buy aeria cards go get points or spend real money on them to get fancier items and such.

I know a friend of mine is quite fond of Shaiya, also free I believe but more realistic looking. It has more PVP than I really want though, so I didn't look into it. Aeria has several games and I think most of them are free to play but I haven't looked seriously into them.