GM related irrational insecurities:
"Oh god I'm railroading them aren't I"
"Nobody responded in 15 minutes to the interest check, so clearly it's gonna slide off the front page and vanish"
"Wait wait wait let me go back and edit that 200 something times so it's juuuust right"
That sort of thing.
Anything historical or military.
It gets a little annoying when the entire first page is nothing but high-school and academy roleplays.
Military history is my thing, and I absolutely love RP that's centered around fighting bygone wars. Anything from 1815-1945 is my absolute favorite.