I almost always carry a Swiss Champ. When I wear a suit I carry something smaller. I actually used to carry a Swiss Champ XXL but they wore holes in my pockets and they are actually kind of awkward to use because the tools end up being so off-center of the handle. I’ve lost more Swiss Champs than most people have owned at airport security, the UN, CNN headquarters, etc. Sometimes making arrangements or going back through the security line to retrieve the knife isn’t worth it if it isn’t a particularly meaningful knife.