Cake, Drink (alcoholic or milk), 'puters, (sad as it sounds) philosophy, military vehicles and firearms
Pefect Circle, Tool, Disturbed, Prodigy, Foo Fighters, Zebrahead, Blink-182, Linkin Park, Nirvana, Slipknot, Franz Ferdinand, Limp Bizkit, Lostprophets, P.O.D, A, Ash, IN Flames, Transplants, Feeder, Placebo, Offspring, Metallica, Taking Back Sunday, Sevendust, Zebrahead, Stone Sour, Taproot, Inme, Idlewild
Se7en, Saw, Leon, Saving Private Ryan... you get the picture
Tom Clancy's series, Stephen King others I cant think of now
Carlos Hathcock, Guy Gibson (do some research), All those serving in the Armed forces around the world