I agree with some of the earlier posters. My definition would be:
* 22 rifle - auto or bolt doesn't matter. I'm a fan of the 10/22, Marlin 60, or CZ 452
* 22 pistol - Ruger MK series or Buckmark, but anything accurate will do
* Mid-power, mid-caliber rifle with irons - 30-30 levergun, SKS, etc.
* Full-power scoped rifle - .308, .30-06, 7.62x54r, 8mm Mauser, 270Win, etc.
* Shotgun, 20-12 gauge, break action or pump.
* Full-sized self-defense pistol in 9mm, .40, or .45. Acceptable as long as it's reliable and the owner can shoot it well.
Bonus Points for:
* Pistol-caliber carbine like the SUB2000 or CX4 Storm
* Hunting revolver in 357, 44mag, 45LC
* Levergun that eats the same ammo as above
* Concealed carry pistol in 32acp or larger
* Varmint rifle with scope - AR-15, Mini-14, any bolt in a .22 caliber.
* Any type of accurate muzzleloader
FWIW, I have:
22 rifle - Marlin 60 (scoped) and CZ 452 Lux (Irons)
22 pistol - Ruger Mk 2.5 Hunter (stainless, fluted barrel, irons)
Mid-power, mid-caliber - SKS (recrowned, refinished stock, irons)
Full-power scoped - Nothing. I have full-power milsurp bolt-guns, but I don't want to scope them. I'll fill this eventually.
Shotgun - Nothing. If my wife decides she wants to learn to shoot, she'll want to do skeet, and we'll get a SxS 20 gauge, which I think is about the perfect shotgun
Full-sized Pistol - CZ-75B in 9mm (stainless)
Pistol carbine - Nothing. Would love to have one, it's on the list of things to buy next.
Hunting Revolver - Nothing. Not even sure what caliber I would pick, but probably 357.
Matching Levergun - Nothing. Probably would be a Marlin 357mag in stainless, and be left unscoped.
Concealed carry pistol - Sig P238 HD in 380acp (stainless) and H&K P2000 in 9mm
Varmint rifle with scope - Vector Arms version of HK93 with quick-detach scope and integral bipod.
Muzzleloader - old .45cal Tennessee rifle I got from my wife's grandfather. Bore is in mediocre shape and I only have round lead balls for it. Very amusing to shoot.