From Halopedia, the Halo wiki
Star Wars 4-7, Rogue One, Spaceballs
Doctor Who, Lost, classic sci-fi series (Star Trek and classic Who in particular)
Billy Joel, Linkin Park, Muse, Daughtry
Halo books, Doctor Who novels, 2001: a Space Odyssey, Ringworld, Star Wars books
Halo series, Pikmin series, Minecraft, Portal 2, Mount&Blade series, anything by The Behemoth, and the Mario franchise (specifically Super Paper Mario. Great game and lots of good memories too)
Anything containing chocolate or meat, except maybe chocolate-covered liver.
When my friend Tyler and I stayed up until midnight playing Reach. I think we got through the entire campaign, but spent most of our time in multiplayer and firefight.
When my friend Tyler beat me 97-11 in Reach. Fun story to tell now, but when it happened, it was a crushing defeat.