Types of stories that don't appeal to me

I'm not very picky when it comes to reviewing or giving my opinion on any fic, always and when it delivers on what it promises and is fun to read, that's enough for me.

I read a bit of everything, clopfics, slice of life, comedy, adventure, crossovers mainly, horror as well, but there is a type of fic that doesn't catch my attention at all. They are the fics starring only OCs, since I came to this site to read MLP stories, I want to see canon characters in situations that are never shown in the program, it can include one or other OC, but when they are the only ones characters on stage, no, just no, I would get bored in record time.

I also don't like fics that have homosexual ships, I have nothing against that, but I'm straight and reading these stories would make me very uncomfortable, I just want to see mares both in lesbian relationships or with a stallion.