As a milsurp guy with eclectic tastes I have plenty of things about which others say I
should be ashamed. Some of their thoughts and my counters, in no particular order...
Anything made in Egypt (Hakim, built using Swedish Ljungman AG-42 tooling, so it cannot be that bad...apart from being stupid long and heavy)
Anything made in Pakistan (Enfield No4 MkII built on tooling supplied by the Brits. Saying out loud that it was one of my better made Enfields caused a ruckuss in some quarters)
Anything made in Mexico (Mexican 1910 Mauser pattern. Yeah, they must be rotten because multiple custom gun makers in the US sought them out to use the receivers to build hunting rifles.

)
Anything made in Spain (Stars and Mausers. Don't believe all the stories about "soft Spanish steel".)
Anything with clear Nazi markings. (It's just history, get over it)
Anything French. (They're more innovative than their looks suggest)
Any bullpup rifle. (I've got short arms and I don't give a rat's patootie about parade evolutions)
Guns not designed by JMB (I'm an equal opportunity gun aficionado)