A trope that I think is overused is most/all characters have some sort of dark and tragic backstory. For me, it's fine if it only a few characters, but it gets annoying when it's majority of the characters.
I like the trope where every character has one or a few major flaws. Really adds some realism to the character.
Plot armor. I'll admit, I use this for myself and Aino in SoS, but you know; it can be used to further the story, and not to show off how overpowered the main character(s) is.
The "Well, they got a point" villain. My favorite type of villains are the ones that became evil because of how their backstory was like and how they were treated rather than villains that became evil just because.
Soooo, any more tropes?
[spoiler][b]Erased....[/b][/spoiler]
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On plot armor. I make it seem like someone has it then just kill them.b