Sig 229 in 9mm. Why? Because I can shoot the heck out of that pistol. Still don't own one yet but my cousin has one that I shoot all the time. Fine piece of hardware.
If I had to pick a pistol I own it would be the Beretta M9A1, sure the Marines already use that pistol but I live in Massachusetts and can only get pre-ban magazines, which I just happen to have a few 15rd mags for the Beretta. So right now the only pistol I own with high capacity mags is the Beretta, therefore it is my go to pistol. It sucks living in such an anti-gun state, but I am just happy to have my CCW and some high cap mags for my M9A1 and M1A.