For my m&p 40, I've bought: tagua leather, (2)different uncle mikes(a minimalist owb, a standard owb), a remora? pocket, a stickie md2 and a kestrel IWB kydex
I carry @ 4o'clock with (1) exception.
I've also carried iwb/no holster - they all work well, depending on what I'm wearing.
For me, carrying with no holster is least conspicuous? with just a "T" (I think it'll imprint the least canted forward)
My exception to IWB is with remora or stickie in cargo pocket - no fast access- but not noticeable to others.
If I'm wearing any bulky top, any of the above are great
I'm 6'2" 191# 35" waist FWIW.
I conclude, none are perfect for all conditions, but something that covers the slide, (sweatguard - Kestrel) is far more comfortable
if you carry for more than a little while.
My top 3 are IWB - no holster/ Tagua (I love my leather), OWB - uncle mike's.
I've tried 1-2 o'clock - hits my ribs when I sit
I have to admit, that versa-carry is interesting
greg