DC Universe Online. My hero is level 25 now. I still get a kick out of levitating someone into the air and having a car smash into them from the side. No idea what I'm going to do with him at level 30.
The other night I saw a Green Lantern fly in, manifest an Apache attack chopper construct and blast the hell out of a group of mobs. I'm pretty sure I burst out laughing. So yeah, chalk up another reason why I'll buy the Green Lantern DLC at some point.
I downloaded City of Heroes on the weekend to try it as well. It's sort of growing on me, though it's showing its age. After DCUO, I find it weird to stand there waiting for cooldowns to finish. And I really don't like not being able to swivel the camera by left-clicking.
I'm half-certain you're supposed to be able to go straight to a Premium account if you've ever paid money for CoH, and I bought CoV when it came out. Haven't figured out how to prove that yet.