Derek Morgan
When he tried to flirt with you an you just brush it off, it makes him really annoyed.
Aaron Hotchner
Sometimes you get a little nosy in his work life and all his cases. This would sometimes irk him and make him annoyed until he told you to knock it off. He wouldn't be upset for long though, he would soon apologize for snapping at you.
Spencer Reid
When Spencer would go on a rant about something, you would sometimes zone off. After he caught on, he would ask you a question about whatever he was talking about. It would make him really annoyed when you stopped listening. Good thing it didn't happen often though.