I Hate 2nds

Well, it's no secret that love triangles, 2nd leads and me don't gel. With few exceptions I've hardly seen a drama where they (2nds) truly served a purpose. Where they're concerned 3 really is a damn crowd and I can't stand them no matter how good, wonderful, kind, sweet, kosher they may appear to be. To me, 2nd leads are part & parcel of a non-creative writer's formula (and that's putting it as nicely as possible). List in order of most to least annoying.