The first is the-... Charlie, basically. 50 year old boomer who thinks life is great and he wants to share shit from his life. He only does it 'cause he thinks it's comfy.
Theme song:

Now, about the second one... I despise this one. If I ever see one IRL I SAY SNAP AND I CRINGE
Hello my name is human, is your name autist? 'cause these people ooh these people they're young and naive and so sure they're right and they think science is always right and there's no room for emotions or anything like that. Not to mention their fucked up sense of humor and lack of ability to feel embarrassed for their actions.