I agree with that everyone has said before. I'm sorry if I repeat anything.
-I also hate characters protected by plot armor. (For some reason no one can hit a 8 story tall giant robot with high explosives)
-Mob characters overly loyal to there boss like stupid sheep (There's no way the captain would lie to us he's more pure then superman, buddha, jesus, and because some people are born super honest)
-every story taking place in tokyo (Is japan only one city?)
-maids, lolis, cat girls, childhood friends and any combination of them
-any character over the age of 17 is useless and the cause of all of the worlds problems (Cause we all know at the age of 12 we reached an unrivaled since of enlightenment)
-said underage characters can beat people with years of training despite there experience
-said underage character understands TRUE LOVE in there VERY FIRST relationship ever
-nakama power
-the argument of talent vs hard work (Success is 99% hard work, successful people fail all the time but they understand the importance of perseverance)
-otakus (Cute at first but there are other subcultures that should be explored)
-any chapter that's a culture festival, school festival, pool trip, beach trip, hot springs, character is sick, peeping, etc.
-main character is always right on judgement calls, and the few times they may be wrong they learn nothing from it, or everyone makes excuses for them
-main character seems to stupid to function in his/her day to day life yet is destined to save the universe
-rape, incest, pedophilia, molestation played as jokes (These topics can be mention in any story if you know how to handle them, but most of the time I can't stop thinking the writer is a hackney idiot)