Short answer for both of you?
A little from column A a little from column B.
Yes, obviously, I have an interest in transformation fics.
(And fukufics themselves, but they're a dying field)
So there is an out of story reason to go "Let's have Ranma become X"
There can still has to be an in-story reason for why it happens.
Heading out the door, so long answer later today.