My worst was my first handgun I purchased, when I turned 21. A Taurus 24/7 pro .45. All in all a decent gun, but had a tendency for light-strikes. They defaulted to DA for "restrike capability", so it wasn't much of a problem. Also, one a few outings to the range, I would inadvertantly drop my mag under the recoil of some heavier loads. I think a heavier spring would have fixed it, but I just traded it in for a better gun instead.
“There are three reasons to own a gun. To protect yourself and your family, to hunt dangerous and delicious animals, and to keep the King of England out of your face.” - Krusty the Clown