I've carried a Sig P239 in .40
a S&W 686 6 inch barrel in .357
currently I carry a full size Sig P220 in an inside the waistband rig.
on hot days when shorts and a t-shirt are more preferable i carry a kel tec pf9.
I would like to switch to a Sig P226 in .40 or a CZ-75 in 9 mil. or carry a 14 round 45 acp like a XD or a FNP, heck, I'd even consider a Para 14 round 1911.

The one i've been the most faithful to is the P220 though.