A cliche that's not really on the level of "can't stand", but I'd still like to see less of: two (almost always male) characters have an emotional confrontation, and they decide to resolve it by punching each other. This somehow leads to them "understanding" each other.
I don't like it primarily in the sense of "seen it too many times, get new material", and partly because I just don't really understand how fisticuffs apparently automatically leads to "connecting feelings". The recent examples I've seen are also often in the vein of "I want to understand you, so let's fight", like it's assumed to be a valid means of communication.