I have one smallbore free rifle, one lever-action .22 rifle, one competition air rifle, one "plinking" air rifle, one shotgun, one .22 pistol, and one low-end competition air pistol.
As I don't hunt, I have the fewest firearms of any shooter in my club. Most of my friends have dozens of firearms.
But as Paw080 indicated, it can be a touchy subject. Too many people call 50 rounds of .22 amo a "cache" and 3 firearms an "arsenal". Just imagine if someone was pulled over with a case (5,000 ROUNDS!) of ammo in their trunk. Too many people make too much ado about nothing.