I've used Kydex and leather IWB for a number of years and much prefer the leather. Leather seems gentler on the finish and more comfortable to me. I prefer the open bottomed holsters as they don't collect lint or other foreign bodies at the bottom of the holster. I do prefer holsters that cover the whole barrel and not those that leave the barrel or end of the slide exposed. I've used Don Hume and am happy with their products. I also have the usual drawer full of different holsters by different makers and all are functional. Holsters are like potato chips- you can never have just one. Good luck.
best wishes- oldandslow