I'd have to think about it, but what comes to mind now ... Darker than Black. Contractor. But I'd have to have a chance to choose my ability and remuneration. It would be really sad to end up with something like... Spitting glue at the cost of breaking a leg.
Thanks to you I read the manga.
I would definitely take the power to phase at will. Renumeration?
No wait, that's shitty. I want the power to do magic like that one guy!
I don't know how the renumeration for the actual power in the series works (haven't watched it yet), but I'd want to renumerate by eating Peanut M&Ms. Mmm.
Also, Psy-Ren as a reality? Super powers and post apocalypticness and time travel? Hell yes!
Although what I would probably want most to be real is The Girl Who Leapt Through Time.
Time travel? I'd essentially be unkillable, because I could rewind time every time I died. Also, time travel. Hell yes!