As a player and a co-GM, I will start out with saying I am [i]really[/i] not a fan of any challenges that involve transforming or swapping characters.

This is largely because I generally feel like people have signed up to play a character, with that character's personality, appearance, and powers all intact. This is how I feel about it at least.

That being said, the non-transforming ones have potential, though I'll have to look into them a bit more.