Champions Online is based on the tabletop RPG where players assume the persona of a comic book hero.
http://www.champions-online.com/f2pThe character creation and costuming is solid. I played City of Heroes all of 5 minutes before uninstalling it but I've been playing CO solid for 2 months. Unlike CoH, CO does not restrict character names and the character renderings don't look like they were made out of wood blocks.
Since the F2P build came out story progression has been cleaned-up considerably and for the better.
Heck, if a couple of you join we could start a group. PM me if you do and I'll give you my account username.