In the summer and ocassionally in the winter I carry Kahrs, I personally would not carry anything less than a 9mm mainly due to my own ammo/penetration testing. I had a J-Frame for some time but the Kahr carries better and is more accurate. In the Winter when I have on heavier clothing I usually carry HK 45's or full size M&P's
The kahr PM nine is very light and works great inside the waistband, in an ankle holster, in the pocket or on belt slide, my MK9 elite is a bit heavier but still carries nice. I had a keltec but it and every other one I have fired drops the magazine when I shoot them. Most likely due to my grip or hand size but it made it a useless carry gun for me. I have also had NAA and AMT minis and they just were not as reliable as I like.