I generally either carry a G21 or a 4" Dan Wesson Model 15 in .357mag. I find full size pistols as easy to conceal as compacts are and I get a more shootable pistol out of it with the big ones. And no, I'm actually pretty darned skinny and of average height. It's not hard to keep a G21 out of view in a long t-shirt and jeans. The DW, that's almost always done OWB and unconcealed. With a revolver there's never any question in the mind of the deterred on whether or not it's loaded and I think there's something about a revolver that gets the mind of a crook very focused on upcoming plan changes in a way that the Glock doesn't. With my Glock, being as it's a .45, it depends on the angle of the light as to whether or not you can see for sure if there's any bullets in there and then, you only get to see the 1.