Shook hands or had mostly brief conversations with the following:

Ashley Judd (not very friendly)
Jimmy Carter (was 10 years old and in a long line of people)
John Wooden (spoke to my college basketball team for an hour and gave me some personal pointers while watching our practice)
Fred Thompson (struck up conversation at Tennessee Titans game. Very nice guy)
Pat Summit (several conversations at UT alumni events. Very down to earth and personable)
Peyton Manning (just a handshake and a brief hello)
Vince Gill (at a small get together at mutual friend's house. Super nice guy and very funny)

Always remember that you are unique, just like everyone else.