Re: Do random power SFX games work?
I can definitively say: sometimes.
The old Marvel FASERIP system was designed to be random originally, but when they expanded the rules they included build-your-own rules because of the demand for it. I've tried this once in Champions, and it was ok, but it only lasted one night (for various reasons). Typically, I prefer to build my own, but I like the idea of setting aside 10-20 points for "Mystery power" just like a "Mystery disad."