My choice depends on what day it is, what's legal and what we're hunting.
As far as big game, I love hunting with my bow but won't hesitate to grab the rifle or muzzleloader either.
With turkeys, could be bow or gun.
Waterfowl is always the Benelli SBE.
Small game, mostly shotgun but I hunt squirrels with the .22 and would take something other than the shotgun for rabbits if the mood struck me. If there are pheasants, grouse, or woodcock around, I usually carry my Rem. 870 Wingmaster 20 ga. (My favorite small game shotgun.)
"Knowing when to shoot and when to wait is one sign of maturity in a bowhunter. Be patient and pick your aim point carefully." ~ Randy Ulmer
"I suppose it's the way of hunters. We are very odd fellows." ~ Peter Hathaway Capstick