I'm a terrible person because I'm sitting here entertaining the idea of Sebastian biting (either successfully or just attempting) Constance. But then I'm also kind of "nooo ):" at that idea, so maybe there's hope for me yet.
Sebastian's no good for being genuinely outraged at Gwaine for betraying his kind, but he is good for the arrogant vampire thing and for going "you hypocrite if you want to get rid of vampires why not start with yourself lol?"