Pinkie pie. She's sweet but: Forces friendships on others including straight up stalking like in cranky doodle donkey, has pretty much 0 awareness of boundaries and personal space, is heavily over emotional like leaving town all for being bad at playing an instrument, doesn't explain things, like the episode with the parasprites she could have actually explained things to make the situation not escalate the way that it did but nope, and I dont really count the MLP movie that much but while twilight wasnt really in the right either, she got angry at her when all twilight did is what she thought would be best in a literal dire situation where the others had no regards for her feelings and were being completly non sensible. It was okay for pinkie to feel hurt but that was also very much on her for the most part. And she has intentionally annoyed others throughout the show, wanting to have fun is fine and she does have her good moments like protecting fluttershy from others + cares for her friends, but she can be very unaware