I like playing Tera. It is free and has more or a live combat system. I enjoy it greatly. Plus being free you have nothing to lose right? ^-^
Tera is my favorite MMO out right now. By far the best combat in any mmo released to date and the graphics are several notches above anything I've seen in a MMO thus far.
Ive Enjoyed it enough that I have sub to the game and that takes a lot for me to do these days. Between Tera and Eve Online I don't have much time for anything else.... Ultima Online a few hours a week maybe.
TERA has flaws.
It has a combat system that has officially ruined every other MMO out right now.
Its just a thousand miles ahead of everything on that aspect.
TERA sucks but has interesting combat. Rift has a pretty good free to play model but is pretty generic and uninteresting to me. World of Warcraft is pay to play, but has a very large community and arguably some of the best and most refined content in the genre. Final Fantasy XIV is a pretty sub-par to average WoW clone, but has great appeal for Final Fantasy fans. Pay to play, though. For some reason I play this one currently. Everquest 2 has a decent free to play system but I don't like the game at all. Vanguard has a kinda limited free to play system and is overall not that great. Some really like it, though.
I don't get why people hate WoW combat. To me it's notable for having some of the best combat of any game ever. The flaw that made me quit was it being grindy in a stupid way. The combat is one of the biggest pros it has along with the community.