My favorite rifle has to be a 1998 Ruger M77 Mark II in .30-06, topped with a Tasco 4-16.
My favorite shotgun has to be an old bolt action New Haven by Mossberg .410. Too bad I gave it to my girlfriend before I realized what a prize it was though!!!!!
In rimfire, I'd give it to my old 1958 (if I remember right) Marlin Model 99 M-1a in .22 lr. It's awesome, it looks just like an old m-1 carbine, only a baby version. It's had a terrible life, before I got ahold of it that is, and it's had nearly 50,000 rounds through it, but it still shoots just as accurate as any of the other .22's I've had.