Singing. Musical theater has been a great outlet for me. On the other hand, it's pretty time consuming, so lately I've been using karaoke to fill the void.
Learning languages. I'm working on Portuguese right now. It's like Russian-sounding Spanish!
Also, once I become a regular at any convenience store, I become known as the "happy guy" (I'm pretty damn upbeat).
Books: The Great Courses audiobooks, A Game of Thrones (though I got stuck in the doldrums of A Feast for Crows), the Harry Potter series, Slaughterhouse V, The Autobiography of Benjamin Franklin, The Catcher in the Rye, the Wheel of Time series
Movies: Big Fish, Forrest Gump, Hayao Miyazaki, Donnie Darko, Love Actually, The Emperor's New Groove, Hocus Pocus, Clue
Music: Iron & Wine, Death Cab for Cutie, Black Eyed Peas, Don Omar, Daddy Yankee, Whitney, Nobuo Uematsu, 80s music, John Williams, Alan Silvestri, Alan Menkin, Stephen Sondheim, Jason Robert Brown, Billie Holiday, Mel Tormé, Beyoncé, musical theatre in general
Food: hummus, chili, guacamole, coffee!, chicken parm, Subway subs, dark chocolate, sweet potato fries, wraps, spinach omelettes; my three favorite cuisines of the moment are Moroccan food, Indian food, and Mexican food
Famous People: Oprah, George Carlin, Whoopi Goldberg, Milton Friedman, Pope Francis, Thomas Sowell, Michelle Obama, Elizabeth Warren, William F. Buckley, Jonathan Haidt, Patrick Allitt (I've tried to intersperse people from different ends of different spectrums. Like I said, I really value intellectual diversity.)