I just cannot choose one.

It just depends on the task for which the gun carried.

Self defense my favorite is the 45ACP in a 1911 platform
Second to that is the 9mm in the 1911 platform.
EDC self defense is a 38 Special in a revolver Model 36 S&W.

Hunting deer;
If going light and on the move my Glock MOS model 40 10mm.
Or my newly aquired Remington R1 Longslide. 10MM

Stand hunting for deer the following in order of preference;
240 Raptor in an XP-100 custom.
6.8 SPCII in a 15" Encore.
7mm-08 in an Encore.
The above for Antelope hunting as well.

Elk hunting;
338 Federal encore barrel. 180 grain Nosler Accubond.
375 GNR encore
444 Marlin with a 270 grain WFN GC cast at 1650 FPS. BFR revolver.
460 S&W

Small Game;
22 LR
327 Federal

Woods Walk about guns and calibers;
10mm Glock model 20 Custom 1911 Commander size
44 Magnum Ruger Backpacker snubby
327 Federal Ruger 101 and a Custom S&W custom converted K frame.

Just cannot pick one !!