I currently have a HK P7, SIG P232, Walther P99cAS, SIG P225, P229, P239, P245, and a S&W 642, as carry guns. I like them all for different reasons and wouldn't part with any of them. They are all smaller than "full size" guns and I have Milt Sparks VMII holsters for most of them. I don't try to carry my full size guns like the 1911's or CZ75.
Usually, I choose which one to carry based on what I am wearing. The P7 and the P232 are the thinnest and easiest to hide if I am wearing nice clothes. If I am wearing a baggy t-shirt or untucked golf shirt I carry the P239 or P245. If I wear a tucked in t-shirt and also an unbuttoned short sleeve shirt over it, I carry the P229 or P225. The walther and S&W don't get carried much bu I like them anyway.