The new Smith and Wesson Sigma in the new 40 S&W caliber. I hated that gun. It jammed. It double fed. It stove piped. And that was after sending it back to S&W.
However my second gun is one I still wish I had. A Smith and Wesson 915. It was reliable, accurate and never failed me.
Handed my mom my first paycheck from my first summer job ( $235.47 in 1974 ) and we went to a gun shop owned by a friend to make my first purchase. Still have the gun and love it as much as the first time I shot it. Brings back great memories. ( Retured the favor last week and bought her a S&W model 19)