"* A certain food, fruit, or serum can give them a power - and a dependency. This could be an awesome way to get compels and to get a power at a lower cost (due to the dependency)."
How could I NOT think of Popeye here?!
"I think people should be able to play what they want to play. When I first got interested in RPGs, I walked away from my first game I was slated to play because the GM in question was lazy, didn't want to change his story for anyone, and pretty much demanded I be an elf warrior."
I will let the PC's pretty much mix n match from powers, as long as they have a character concept that justifies things; I also am much more generous for players who I know are not compulsive power gamers - if I know (from experience) that someone will push (abuse is too strong a word) their abilities, then I'll restrict them more.
Dian