Their memories. Why are they so vague? I still see many moments so sharply.
Their faces. Why do they look older than me if we’re the same age? Have they had more fun? (Except for my neck. My neck looks bad. Pretty sure it hasn’t had more fun, though.)
Their taste in movies. Not universal, but very, very frequent.
Their tolerance for background noise.
Their desire to almost always be in company with another.
Their shoe size. I have a common shoe size, yet no one seems to share it. Why?