Those I have actually met/spoken to are in bold, the rest are those I have seen in person (from afar, in the same room, etc.).

• Adam Baldwin
• Adam Shankman
• Allison Anders
• Andrew J. Ferchland
• Arlen Escarpeta
• Bob Dole
• Brad Pitt
• Bud Gaugh (drummer of Sublime)
• Camden Toy --twice!
• Candice Patton
• Carlos Ramon
• Catherine O'Hara
• Charisma Carpenter
• Charles Gibson
• Chris Hardwick --thrice!
• Clark Gregg
• Dagney Kerr --twice!
• Danielle Panabaker
• Danny Elfman
• Dave Foley
• David Fury
• Dennis Rodman --twice!
• Doug Jones
• E.E. Bell
• Enver Gjokaj
• Felicia Day
• Gregory Smith
• Harry Groener --twice!
• Hillary Clinton
• James C. Leary
• James Marsters
• Jenna Elfman
• John Leguizamo
• Josh Blue
• Joss Whedon
• Juliet Landau
• Keith Szarabajka
• Marc Guggenheim --twice
• Mark Lutz
• Mia Farrow (plus Ronan)
• Mike "The Miz" Mizanin
• Missi Pyle
• Nicholas Brendon
• Nina Diaz (lead singer of Girl in a Coma)
• Rob Riggle
• Robia LaMorte
• Ross Philips
• Rudolf Martin
• Scott Frank
• Sean Maguire
• Stephen Amell
• Tom Lenk
• Wesley Jonathan
• Willa Holland
• Zack Whedon