I carry my 637 almost exclusively in my pocket and use a set of Grashorn elk grips and a Tyler T grip. The elk grips have just enough bark for a good grip, but do not hang up in the pocket like checkered grips (plus they look good!). Before the Grashorn grips, I used smooth Hogue grips. On my 940, which I carry in a IWB or belt holster, I have CT grips, which are just too "sticky" for my comfort for pocket carry.