I helped to place my own stoma, actually. When I went in for the marking, I asked for as low as it would go and still be functional so that after all is said and done the scar would be easily hide-able under pants, undies, and bikini bottoms. Plus, I didn't want it too close to my navel because I want my belly button to be the main attraction of my abdomen so to speak. :-P It's all just vain aesthetics, but I'm happy with it! I heard from another stoma nurse that my WOC nurse is bolder with stoma placements than most - as soon as she saw mine she guessed who it was that marked the placement, LOL - it is lower than anyone else's I've seen. It means even most of my bag is hidden under my pants.
Here is a bagless pic from my blog of how it is situated: 4.bp.blogspot.com/-Uk1fc07UA2o/UH85cK8rRBI/AAAAAAAAAKI/MQDkgC9GOsU/s1600/undies+2.JPG
(That was at my first bag change when it was still pretty swollen. It's a lot smaller now, at 7/8".)
I didn't realize or think about
it until well after the fact that I had posted a pic of me in my undies for the whole world to see, LOL. Oh well, it's all for educational purposes!