>"I think the place where you're running into confusion here is thinking of it as a genre."

Yes, thank you, per some of the other replies in this thread, I've been advised to consider that "id-fic" identifies the author's motivation for a work more than the product of her work.

I'm concluding that it is a term I should largely stay away from. :-)

>"By the way, are you familiar with the id-superego-ego theory of the mind?"

Yep. Thank you. I am indeed a little familiar with that construction. :-)