1- I hate it when people drastically change a social situation, and then turn around and get upset when they learn that things are different. It's like they want to change their behavior completely without anyone acting differently.
2- I hate it when my friends are insensitive to a mutual friend of ours. I usually don't notice when people aren't there for me; I don't expect them to be. But when people purposely ignore their friend's feelings, I get pissed off.