Cool Thread!
Once I established my favorite shapes I added duplicates. As mentioned they don't all smoke exactly the same but they're all good and I enjoy them.
My favorite factory made bent shape is the the Peterson 03 / 303.
Left to Right: 03 Silver Spigot Tan, 303 System Premier, 303 System Premier, 303 Standard
My most loved and smoked factory made straight pipes are Dunhill Canadians.
Left to Right #4 EC Shell, Chestnut 3109, County 4109, Shell 3109