City of Heroes has gone Free to Play! http://na.cityofheroes.com/en/index.php (Or uh...Premium, if you're a returning player.)
Hmmm it might be fun to get back on CoH, I havnt played since Warhammer was released. Although Im pretty sure my old super hero group Stryke Force is gone *pouts*
Anyway, there are three games I can recomend having played them at one point in time (and sometimes still play)
The first is Echo Bazaar.
EB is a game in which I find myself hard pressed to explain its premise or style of play. Really you just need to check it out and come to your own conclusions
The second is Dungeon fighter.
Think streets of rage as an MMO. You are welcome!
The third is a game I learned of just recently called Stellar Impact.
Think of it as a naval style DOTA game only set in a science fiction world where you fly space ships.
There are also two honorable mentions I need to toss out there. One of league of legends, which a lot of people on Elliquiy play and the other is for Super Crate box.
Theres also a free to play MMOFPS/3PS game coming out in the near futur called firefall, I suggest you check it out.