I've responded to a lot of posts in this thread, but here is a little background on me. I used to be a professional automotive mechanic and found that it wasn't paying the bills like I had envisioned. I pursued another career....
I am a field technician for a world wide rental company. We specialize in larger generators (2MW), diesel and electric air compressors up to 1500cfm, temperature control equipment from A/C's, chillers, dehumidifiers, pumps, cooling towers, heaters, etc.
Most of the jobs we get on are temporary emergancies. We work round the clock and have major contracts with critical companies. We are all diesel mechanics, HVAC techs, electricians, etc. We are not legal electricians as the codes change from county, but 9 times out of 10 we are.
With that said, I have a set of tools at my shop for when I am not on the road traveling. Then I have a set on my work truck that is used 75% of the time. And then I have a set of tools at home.
Over the years I have learned what makes a good tool. A warrenty that is lifetime doesn't mean squat if it is 3 am and you are 100 miles from the nearest sears to turn in the ratchet you just broke. Been there done that. Sears, husky, kobalt, etc all made decent tools for the average tinkerer, but not the day to day professional.
Alot of my hand tools are snap on. I have a very good dealer and have never had a tool not warrentied. Their sockets, ratchets, wrenches, screwdrivers, extentions, etc all have a home in my three tool boxes (work truck is a mobile tool box). For the other tools I rely on, there is Fluke multimeters, Cooper temperature RTD's, Knipex pliers, Klien pliers, greenlee cable cutters, fish tapes, crimping dies, hole knockout sets, Irwin drill bit sets, Rigid Pipe wrenches and Pipe vises, Rigid strap wrenches (great for large oil filters!), Dewalt XRP 18V cordless tools, Tap and dies (USA made), etc.
I've gotten a lot of my stuff off of ebay and local auctions. I just cannot afford to have three complete sets of tools that I got brand new off of the Snap On truck. Blackhawk, Proto, Mac, Wright Tool, Matco, Cornwell, all make excellant tools. I have a lot of older MAC tools that I got as my first real tool set when I was 16. Dad bought me a tool chest at an auction for 50 bucks. The stuff was probably 30 years old then. I still carry some of them on my work truck to this day. The newer Mac tools are made very cheaply and I have not been impressed with them. I have lot of old tap and die sets that were my grandfathers and are 2-3 times the quality of the stuff made today. Snap On and IR make good air tools. Most of the older mac impacts were IR's, but now there stuff is taiwanese.
Snap on is just like any other tool company out there....They have their good line of tools and toolboxes, and then their is there more affordable Bluepoint line. most of thier blue point line is made overseas.