I opted "utility" as it's the primary factor in most of my purchases. For example, I have at least one duplicate of each of my regular carry pistols, and anywhere from five to fifteen magazines for every auto pistol I own. My hunting and defensive rifles, same (well, probably have over 50 AR mags). Have different optics for each AR, i.e., EOTech HWS, ACOG, LPVO. Purpose built bags and cases for each firearm for any possible use/situation (range, hunting, camping, bug-out, etc.). Keep parts on hand for each pistol I own, order parts kits at least a couple times a year.
Lately I've tailored expenditures based on the possibility of having to evacuate my property quickly due to the anticipated 9.0 plus earthquake up here and potential tsunami or other catastrophic event. Unlikely, but I want to be prepared. So rigging vehicles, bikes and boat for such.
But, I could've voted "collector" as well. For some reason, I keep accumulating old Colt and S&W revolvers as well as the odd 1911 here and then, none of which I "need" at all. Just like 'em.