First answer, Golden Warrior for me. It's always a turn on.
With that out of the way, what are your favorite and least favorite cliches you've seen in anime?

I already revealed my favorite; my least favorite?
It's a cross between Mons and "Explain your backstory and love for your friends/lack of need for friends before a fight."
That's really it in the least favorite category in shonen at least.

The entirety of harem feels old.