My "all-around" holster is just a simple elastic belly-band. It works for me with just about every auto I toss in it, and now revolvers as well. I wear it a tad low, so that the grip just sticks out above my belt, and tuck my shirt in between gun and pants.
So far, even folks that know I carry (and carry themselves) can't figure out where I hide the darn pistols...
It really surprised me to find out that I -can- hide even full-size autos on my skinny little 5'6" self, -without- altering my manner of dress.