The Remnants is a good bet, actually, what with Dr Whatshisname at Jacobstown and all, didn't think of that. I wonder if at one point there was going to be an alternative 'murder-the-remnant' approach to that quest or something. Or maybe it's just a cool little reward for any anti-Enclave fanatics out there.
Did you kill Doc Mitchell?
Yeah, he was my first victim. This character always opens hostilites immediately.