Character Similarities

[Remnant]

Well, i've been doing some thinking lately. From what i've seen, each person who role-plays a character, gives them a few quirks here and there.

For example, all of my characters know each other to at least a semi-familiar degree, and the wide variety of them are intelligent in different fields (Scientists, Bankers, Political Workers). I just now caught myself thinking that I never made any characters out of these bounds.

What about you folks? Do you have your characters share a similarity boundary which stretches across all of them? Or do you have a wide variety.