4:00 and 8:00 are your common positions, but everybody is different. You just gotta see what works for you. I change it up depending and what gun I'm carrying. When I carried my Sigma daily I carried 8:00 with a little extra cant to hide it. When I carry my G26 or M&P I'm usually switch back and forth between 3:00-4:00. I have a hard time picking a permanent spot, as I'm sure you figured I'm ambidextrous which is a curse in itself.