What grinds my gears are minimum effort interest checks. Usually these are fandom ones, where they take a well known title and try to lure people in to make their RP for them. 

For example;

TITLE: Naruto RP?

OP: So i felt liek making a naruto rp but i dont have any ideas for a plot pls help lol

They can be of varying quality, but they universally share the same premise of offering nothing but still expecting to build a community.