Adventure/Fantasy - Multiple love interests where one has to be left holding the bag. Should just have one interest, or none.
Weak to strong with male MC - Tall Male Protagonist, often it ruins the contrast between him being weak. Like, who the hell I going to underestimate a guy who's one 6' and full of muscle? Seriously.
Majority of Genre's with Female MC - Short Female protagonists, short is usually associated with weakness, so the short tiny female being domineering really makes no sense unless every other character is stupid and doesn't realize they can bully them. often come up with the stupidest reasons for why she controls others, or is able to move against the antagonists.
GB - Weak motivations for the characters, or weak plot lines
Harem - Either wallflower love interests once they're captured, jealous harem members which cause discord, or some other crap. Too many members/characters that are otherwise nothing more than tropes.
Revenge - Not enough cathartic payoff. Often the bad guy gets let off way too easy to be satisfying, or they team up with the MC. I hate protagonist/antagonist team up. I'd rather they absolutely can't work together.