I have a wide range of American-made brands that populate my many toolboxes and tool cabinets.
My most common tools are Craftsman USA, Wright, Proto, Armstrong, and Stanley.
I have very little of the truck brands like MAC, Snap-On, etc. just because I am a cheap son-of-a-gun that buys most of my tools second-hand, and I've found most truck brands never make it to the flea markets or yard sales, and I'm too cheap to buy them new.
Some tool types have their own specific brands: I have hammers by Vaughan and Estwing. For screwdrivers, I have lots of Xcelite, Vaco, and S-K. Pliers, I have Kleins and Channellocks.
I also have small collections of vintage tools, like Plomb, Indestro, Williams, Millers Falls, and lots of other small lesser-known names that most people forget about. I save them for posterity's sake, I handle the tools and think about what they might have been used to build, say, 100 years ago, or during WWII.
I find it fascinating the tool business/hobby - how I can collect and use a bunch of tool names, like them and come up with my own reasons why they are "the best" for me. I'll meet someone else who has similar or completely different sets of tools, and their own reasons for why his tools are "the best". I've gotten into hours-long conversations with other mechanics about their hand tools and their pluses and minuses, their history and their care. Amazing.