Evil is the way to go in Infamous. Throwing cars at enemies, shooting red lightning out of your hands, etc. Awesome.
I tend to do the same as Mike in RPGs, being as good as possible. In open world actiony games, I'm pretty much a genocidal maniac. I kill everything in Far Cry 3. People. Tigers. Bears. Sharks. Cows. Pigs. Fish. Turtles. Birds. Everything.
Bonoz and LeMeLz, youz guyz should look into getting Alan Wake for the 360. I think it will be right up your alley considering I know you've mentioned liking scary type games. It's pretty much a mix of Twin Peaks, X-Files, and HP Lovecraft. On top of that, the general gameplay mechanics are a lot of fun. One of my favorite games this generation. You can probably find it for $10 or less now too. The full game, the added DLC, and the recent downloadable game (American Nightmare) are all pretty great.