Easy my modified series 70 Colt Gold Cup. Bought it new in mid 70s! Carried it for many years as a CCW, though it started out as a target only gun but to be blunt Bulls Eye shooting bored the heck out of me. Then I modded it for PPC and our clubs version of Combat Shooting.
Very dependable, accurate gun and its more than just my favorite non Smith, It is the most favorite Handgun I own.
I've owned a couple 1911's that just weren't reliable. Saving up to give a Model 70 Colt a shot.
Until something comes along better, nothing has been more reliable & accurate than my Springfield Armory XD's. They may not be the prettiest, but for function & reliability, they are hard to beat.
1951 Colt, 38 Super, Commander...Pray tell what is not to like...Ivory grips on top of the great semi...again what is not to like.....Love it needless to say...