I try to mix what is fun to play with the powers that I think make sense for who I made. My one scrapper character, Amber Asteroid, I gave him Kinetic Melee and Reflexes. The powers I had in mind for him is that he is a physical fighter who flies at incredible speeds (I havent gotten him Flight and Speed yet though, lmao), and he has a small bit of photonic energy in him so that powers up his punches more. The reflex line seems to imply things like inhuman speed and ability, so I thought that would fit.
Also, things like the Origin help sell the fantasy imo. I don't really know how good the origin skills are, but still, the thought is still there.