Here's a new one -
I sometimes go back on YouTube, and listen to music that I remember when it was new, and wrote it off. I didn't like it because it was emo, or too frat-boy-ish, or some other reason like that - a superficial, taste-based reason.
Most of the time, I find that I still aren't into it, but more than anything it's just a matter of taste/style. I recognize that it's competently made, just not my cup of tea.
But before, I also remember thinking that when people liked these things, I jumped to the conclusion of value-judging them for their tastes - oh, this person dresses this way, talks this way, listens to this artist or is part of this subculture, drives this kind of car, etc. they must be an a-hole. And I mean, I don't know what they were like in their personal life. But the vast majority of the time, it wasn't anyone that ever treated me badly personally.
I wish I realized that I don't have to get all mad and critical of people, just because they have tastes or belong to subcultures that I don't share.
If someone hasn't actually done bad things, but they just have tastes that I don't, it doesn't automatically make them a bad person and I don't have to just hate them or assume they are an a-hole for no reason.
I guess...it's an example of how I misplaced my emotions, because I was not putting them where they were supposed to be - in getting good at something and living my own life, because I thought I wasn't good enough for that/that it was impossible for me.