I'm not like most in the fact that I frequently change up my carry options depending on different factors. I carry shield9,g19,sp101,340 m&p, kahr cm40. I train with all and I am not worried about having to draw and muscle memory issues or speed. It works for me so to each their own.
I like my IWB single clip kydex from concealment express a lot they have a full sweat shield and are super easy on and off. Works well in appendix or 4:00
I have 2 alien gear 2.0 holsters that were my first holsters. I like the soft backing and the water resistant membrane but I do not like that only one side plate is molded and the other is not. My kahr rides fine but my shield slips constantly. Also depending on the belt loops position and the two hooks I would fight to find ideal location. This is a side hip holster and is limited in that manner. The price is good and the policy and service are great. Ultimately a "formed" holster is my preference.
Blade tech holster is nice. I got the IWB one with the two loop snaps. I like it but the snaps are bulky, which I can swap out.
Gould and Goodrich leather IWB is cheap and fine and sees minimal use just like my glock brand OWB holster.
**My absolute favorites though are my Alabama Holsters kydex. Get the "Offside" holster. They call it their church holster because it is fully tuckable. It is awesome and my favorite and can carry anywhere on the belt line. I also got one of their pocket holsters which i do like as well. They are truly awesome products and Service. Go with Alabama Holster and you will not be disappointed!