If Abraxas is the center of a story, he should be presented as older - not a young, healthy man. Because...this isn't just about rare characters, but a way to show that age or size or appearance not being the norm isn't a reason why somebody wouldn't be in a relationship. People have ignored this rule (inadvertently? *g*) over the past four years, and I've let them get away with it, but generally speaking, I try to remind people what the point is of this fest before they invest too much time in writing something I might have to disallow.
And Phineas...wow, I'd love to have him on the list, but nobody ever nominated him, and the list is completely participant generated (and only before sign-ups begin).