City of Heroes

City of Heroes, the online world that's home to an entire universe of heroes, where you and thousands of other players take on the roles of super powered ... heroes. CoH is all team based mainly, it is mission based or AE ( i hated AE) which is player generated mission, but most people just put a bunch of hard lvl mobs in there and teams would go in there and you get lvl 20 in 15mins, top lvl in maybe 8hrs. The limitless possibilities of the character creator have you pumping out new characters like crazy at the beginning. Then you fall in love with one or two of them, and by the time you're level 25, you can't wait for your next full group capable of blowing through Invincible radio missions.

All the current "big"  MMOs are great games, no doubt about it, they all have something to recommend them. Just like other MMOs, City of Heroes has some good points, and it might yet be a great MMO.  But at the end of the day, apart from its consoley combat and classless power system, CoH is "just another MMO", and a rather buggy, incomplete and unpolished one at that.  The main point is, this game is just like every other MMO in being a mostly-solo-some-teaming experience unless you dedicate to a guild.

If you try it, my suggestion is that when you load into the world, immediately say your level and that you're looking for a team. It's a great way to level quickly and get adjusted. Sure, you can solo, but I find grouping to be much more fun. A lot of people find their niche in this game and have a good time. Some roleplay, some pvp, some go nuts on other aspects.  CoH is an awesome choice whether you need casual or hardcore, just don't expect extreme depth.

City of Heroes official website