Hmm, I'd forgotten about the reincarnation. That makes a bit more sense. Although I have to say that I haven't yet seen a summary (of a modern one) that made me go "ooh, actually that DOES sound interesting!" Maybe one will turn up and I'll get converted.

(I haven't read Snape being a priest, but I have read Black Coffee OALN, and although I can see that it's beautifully written (of course!), it just didn't feel like Harry and Draco to me, due to the lack of magic.)