I'm interested in the fallen angel idea you have, although I'm not sure exactly what the parameters of it are. Is it... the human being (1) falls in love with a person they believe is an angel (2), but while the angel (2) is actually an angel, the human (1) is the other angel from the old, forbidden relationship in heaven who has managed to become a human instead of a demon? And they bump into each other on Earth, I assume, and the story takes off from there. Correct me if I interpreted it incorrectly, though.
Supernatural x supernatural/human are also pairings I am down with, in case I have royally screwed up your intent for the fallen angel plot. (:
I also think about a paragraph is a healthy posting amount (although I may, I'm sorry, have a tendency to go longer -- I'll try not to). And I'm down with playing the more dominant of the male characters in a male/male relationship, although I haven't been a part of a male/male pairing before so feel free to correct me if I get anything wrong.
My apologies if I should have PMed you instead of posting here (rookie ineptitude)!