D'Artagnan is a pretty good one. I would not have been so wise.

I've seen some of them work too (usually when they get more obscure and it just sounds pretty).

lovesdavidtennant would be a bit problematic if you stopped loving him (as are all of those 'loves/wants/secretlover of x' ones. Though doctorsmistress sounds like a bad (or possibly good) romance novel. Or you have something you are trying to confess.