If it was a question of what I shoot the most I would have to go with my Krieghoff K80 Pro Sporter, I run just over 15,000 rounds a year through it on clays (I shoot it 1-2 times every week).

For rifles, I'm still enamored with the Desert Technology SRS, one chassis that can run pretty much any caliber with std, magnum of Lapua/Rigby cae heads. It tops out at the 338 Lapua though due to magazine design. Excellent trigger, one scope and I'm up to four calibers: 243 Imp30, 308, 6.5 SAUM and 338LM.

For sidearms I don't know that I have a favorite.