I blasted through them these past three weeks (and near a Plat in inFamous 2~) and they were pretty fun. I don't think I'll go back to the first one right away because the second was more fine tuned, and Lightning Tether/Ice Jump are a ****ing godsend. I'm kind of disappointed with the final boss of the second game though. It had felt way too easy in comparison to the first game's final boss (which took me like 30 minutes to beat). Still have to do an Evil playthrough in both, and also need to play it on Hard, so I'll see if that helps. I just feel bad that I'll have to make all the evil choices and kill civilians :C except the one that threw a ****ing stone at me while I was a Hero **** that guy
Without giving away too much, there is a completely different final boss for the evil path, but neitehr of them come close to the difficulty of the final boss of the first game