The game that's hooked me most lately has been Hitman. I keep starting off missions trying to go stealth. Then I mess up, have to kill a witness, then the witnesses of that murder, then all the body guards and security who are called to help, all their friends and family, then all the guests who are watching...and before you know know it, I'm the Terminator and everyone knows my face so they all have to die. After a long, murderous spree that appears to have no end, I restart the mission and try to redeem myself. But it always ends the same way. I find myself quoting Samuel L Jackson from Pulp Fiction and gunning everyone down.
I hope the way we play Hitman says nothing about our true character.