I carried a model 10 for the first 15 years in LE, and switched to S&W 5906 and later to Colt 1911 for the next 15 years. Now that I'm retired and much older, I usually carry a 642 because it is very easy to conceal, and also very reliable. Occasionally in cold weather and wearing a jacket, I carry a 64 with 3" barrel. Also, I truly enjoy the old S&W revolvers.