Genre Savvy—I can almost always predict what is going to happen in a movie or TV show, even if I have never seen it before. One of my major criteria for the goodness of a work is its ability to surprise me.
Honor Before Reason—If the only thing at stake is a tournament trophy, that's one thing, but if lives other than your own hinge on you winning a battle, you don't fuck around.
I Can Change Him—No, ladies, you can't. He's the only one who can change him. What's more, a complete psychopath isn't a really good person inside who just needs some love, he's a complete psychopath who if he needs anything needs some therapy, hopefully accompanied by being locked away where he can't hurt other people.
Gender Bender (in fanfic)—If the point is to explore What Could Have Been if Alex had been born Alice, I'm all for it. If it's just because the author thought Alex and Bob would make a good couple but ew that would be gay!... No. If you don't have the guts to write a slash pairing, you shouldn't be writing the pairing to begin with.