Typically Presidents pick an unknown boring person with a resume and sufficient qualifications and the type of personality that will not upstage the President. BERGUM
Pence, Biden, Gore, Bush I, Quayle, Ford, LBJ, mondale
I don’t think LBJ qualifies. And Nixon picked Agnew, because he wasn’t like that, but he stayed far away from him.
Watch him pick one of his sons. Heads go KABLOOEY!