In no particular order - Mandolin, Guitar, Fiddle, Piano, Bouzouki, Music, Swimming, Movies, Writing music, Singing, Acting.
Chris Thile (CHECK!), Benicio Del Toro, Gabriel Byrne, Kevin Spacey, Kevin Pollack, Conan O'Brien. Oh, and all those influential people too...
Nickel Creek, The Ditty Bops, The Beatles, Michael Jackson, Dave Matthews Band, James Taylor, James Brown, Rockapella, Sarah McLachlan, Barenaked Ladies, Kathy Mattea, Sean Watkins, Chris Thile, Queen, David Bowie, Meatloaf, Mindy Smith, Moby, Hootie and the Blowfish, Jack Johnson, Frank Sinatra, Counting Crows, Coldplay, Cat Stevens, Cake, Chris Thile.
Too many.
Scrubs, Heroes, Grays Anatomy, CSI, Mythbusters, Dirty Jobs, etc, etc.
Band Of Brothers, The Filthy Thirteen, Killer Angels, Da Vinci Code, blah blah blah.
Chris Thile, ..