I carry a Ruger LC9S Pro in an Alien Gear IWB holster. Always have my trusty Benchmade 915 in tow.
I chose my LC9S Pro because i really liked the way it feels in my hand. That, coupled with the lack of external safety and concealability made it the ideal carry gun for me.
In choosing a holster, i knew i wanted an IWB, so i just asked friends and did some internet research. At the end of the day it seemed like Alien Gear was worth a shot. I ordered it and never looked back. It is extremely comfortable to me.
My Benchmade goes everywhere with me.