I collect shit that I get at work, namely guitar picks. Not all guitar picks I get make it into my collection, though, just the ones that either have the band name written on it, even if it's a band I don't care for, or the ones that I know for a fact it was so-and-so that used them (for example I have a white thumb pick that I saw Joe Walsh drop just before he got off the stage; the Bob Dylan picks that I have don't say anything on them, but they are the only large nacre-colored triangular picks that I have in my collection; Ted Nugent was the only one that used a medium red-, white-, and blue-splotched Fender pick); a good amount of bands use the generic yellow Dunlop picks. Those I usually give away, unless I'm in need of a pick, then I'll keep it. In my collection I have Rob Zombie, Down, System of a Down, Black Label Society, Ozzy Osbourne, Nine Inch Nails, Train, Lamb of God, Black Crowes, Counting Crows, Green Day, The Eagles, Toby Keith, moe, Daath, Ted Nugent, Shinedown, In Flames, Ministry, Smashing Pumpkins, Jackie Greene, Live, Alice in Chains, Thriving Ivory, Megadeth, Tim McGraw, Brooks and Dunn, Keith Urban, Foo Fighters, Black Eyed Peas, John Melloncamp, Third Eye Blind, Journey, Sheryl Crow, Velvet Revolver, Aerosmith, Thursday, Van Halen, Nightranger, Dropkick Murphys, Craig Chaquico, Jeff Beck, Queen, Jon Scofield, John Mayer, Mark Anthony, and Guns 'n Roses, among many, many others that I can't remember right now. And, later tonight, I shall be adding Bon Jovi to my collection.
Besides my picks I hang the set lists of the bands that I like on my wall. I ran out of room, but I have Rolling Stones, Down, System of a Down, Rob Zombie, Godsmack, Jimmy Buffett, Rage Against the Machine, Johnny Lang, Deep Purple, Smashing Pumpkins, Green Day, Beastie Boys, The Cure, The Police, Bruce Springsteen, Van Halen, Cafe Tacuba, Smashmouth, and a few others that I lost track of.