Bic lighters. I buy the 6 packs, but only use one at a time until it runs out, then I go buy another 6 pack (BTW they are much cheaper that way then in the single pack). So because of this weird habit of mine...I probably have 50 Bics at least. LOL every drawer, shelf, pack and vehicle has Bics in them.
I honestly don't know why I buy new knives...I buy pocket-folders even though I know I'll just EDC my ol' yella Case like I have for the last decade, and I buy hunting sheath-knives when I know I'll only have my trusty Gerber Gator on my belt come Opening Day. I have no real need for more knives...but yet I can't resist them LOL like right at this moment I have a list of about 6 knives I intend to order real soon. *sigh* it's an addiction/compulsion thing I reckon...I done give up fighting it.