"Unpretentious" would be my Taurus Model 85 .38 snubnose revolver, which now has a few dings and some truly disgusting sweat damage. I've sweated on it enough to stain the stainless steel bits, and you don't even want to know what some of the aluminum looks like. It looks like an "after" prop from the set of an "Alien" remake.
It has been my EDC for a long time, and it's miserably hot and muggy here. Which is why my "good" guns are carefully stored in humidity-controlled indoors.
The Taurus is also the most unpleasant-to-shoot pistol I've ever fired. It's only .38 Special, but the grip is small and there's not much gun there; the felt recoil is much worse than my guns in .44 Magnum or .460 Rowland. However, the recoil signature would be the last thing I would be thinking about if I ever had to use it.
It's not a fancy gun, but when the "carry rotation" stopped years ago, it was the Model 85 that I reach for every morning when I get dressed. It's so small and light that not-carrying it is never even an option; if I'm wearing pants, I'm wearing the Taurus. It's just one of those things that's always there, like my watch or my glasses.