Name: I wouldn't have any sort of dramatic stage name. I wouldn't even tell anyone my real name until someone finally managed to defeat me, in which case I'd divulge my real name to them before dying/being imprisoned/whatever.
Power: I'd be able to both read minds and induce crippling, introspective hallucinations in people using the things I learn from sifting through their subconscious fears and guilt.
Motivation: Deep down, I'd really want to be defeated, just to prove to myself that people aren't slaves to their personal demons.
Outfit: I'd just wear regular clothes. It's easy to imagine a villain in a black, spiky trench coat, but someone that fucks with people the way I'd plan to would just be so much more disturbing and scary if they looked and behaved like otherwise normal people.
Montage song:
So, in general, I'd be a fairly depressing and very scary villain.