My favorite has to be my Smith Wesson 5906. A third generation all steel semi auto in 9mm with fifteen rounds in the magazine. Havn't been able to come up with a good carry solution but I'm not in a rush. Probably need an IWB all leather with loops in the front and back for stability and keeping it thin as possible. Probably a custom.
My collection is up to eleven handguns and I'm discovering I don't like plastic. Fortunately all but three are all metal. Two Sigmas. One in 9mm and another in 40. And one Kahr CW9. M&P's, glocks, and XD's leave me cold.