* Today you can be smart and popular. There will always be smart kids that get picked on, but there used to be pure, outright hostility toward the smart kids as recently as thirty years ago. This is especially true for women. My grandmother never told us she was valedictorian until we found her diploma cleaning out her house, women just couldn't talk about their intelligence. Even when I went to high school I remember a girl who would lie about her test scores (she would say she did worse than she did so she could fit in with the other girls).
* Today you can be openly gay. You will take shit for it, but at least you are out. People used to give you shit for it and you had to keep yourself in the closet or else. Situation is still shitty, but improved from a low bar.
* Weirdness can be cool now. Showing an interest in anything other than the mainstream interests used to result in terrible teasing.