I own / have owned a lot of these, and I might get kicked out of the country for naming some of them, but...they aren't my favorites.
AR's
Winchester lever actions
10/22's
Remington 700's
Weatherby Vanguards
Rolling Blocks
Polymer Frame Pistols
Tubular Magazine .22's
Single-Action Revolvers
Thompson/Center Contenders
H&R Single-Shot Rifles
Single-Shot Shotguns
Over/Under Shotguns
AK's
SKS's
Mosin Nagants
Benchrest Rifles
.17 Rimfires
Any rifle magnum designed in the last 40 years or so
The 'standard' rifle cartridges - .223, .308, .30-06, .243, .270, .22-250, .300 and 7mm Mags
.40 S&W, .45 ACP
M14 / M1A's
In my defense, I mainly like oddball stuff. If I had to pick some of my favorite rifles in my safe, I'd be pulling out a few '09 Argentine Mausers, some vintage Rem target .22's from the 37 to the 40X time period, an Anschutz Super Match 1613, or a Ruger No. 1 in .450/400. Or if handguns, some Beretta 92's or S&W K and N frames.