I collect Intact garden gnomes, chems I never use (all), Rattan cowboy hats, Upgraded/Unique Weapons I never use, Armor that looks cool, Companions (inside lucky 38), Bobby Pins, Stimpaks (never been used, weird I know), and all sodas. I think I currently have around 350 Sunset Sasparilla and 283 Nuka-Cola in my vending machine at the lucky 38. I also collect items with the name broken in front of them i.e. broken collars, broken lazer rifles, broken detonaters, broken super sledges.
Completed Games: Oblivion, Fable 3, Saints Row 3, Fallout: NV, Bioshock Infinite, Sleeping Dogs, and Skyrim. R.I.P. Heliospider, Archaic Solace