My brother has recently been playing nothing but inFAMOUS.
I don't much care for the story and can't help thinking all  the peripheral characters are either traitors or that they should die (I'm looking at you, Trish). But rawr. Electricity as a super power? That's kinda neat. Even as they suspend disbelief further and allow him flight and psychic-like abilities with it.

And then the whole karma thing - if it were I playing, I don't think I'd be able to go both ways, as my brother is going to do. But its existence leads you down all sorts of trippy plausible plots for the game's sequel, especially after clocking the game once and meeting the 'boss'.

So, yeah, that's my impression of inFAMOUS. One other thing that was wicked was all the possible physical acrobatics. How he could scale a building and surf over power lines. Go, Mr. Lightning Man!