My Father railed against two things in American shotgunnery -- bottom dumper pump guns and Winchester Model 24s, so I am genetically predisposed to dislike them.
Personally I've always felt the beavertail forearms on Ithaca's Lefever Model 4 Double Trap Gun is pretty darn ugly --
Lefever Double Trap, Field & Stream, April 1930.jpeg
Only thing worse might be the forearm on the Iver Johnson SuperTrap --
Iver Johnson SUPERTRAP.jpg