Started with 3/4 Tons mostly due to towing. I had f150's that always got the job done, but it was definitly hard on them. Although I never had any major problems I just felt better in a 3/4 Ton.
First 3/4 ton was a 96 F250 460 4x4. Then a few years later came across a great deal on a 96 F250 7.3 PSD and that was the start of my diesel love!
I do construction so I pretty much everyday have my job trailer on, its a 7x16 Keiffer Built Cargo King, 12,500 axles and typically weighs about 8500-10,000 so thats my everyday trailer.
I also have a 35' Dual Tandem GN flatbed that has 24K axles I use to move telescopic forklifts when I rent them.
Biggest tow is my buddies 644 skytrak telehandler....21,000lb machine weight plus my GN trailers weight and the work platform....guessing somewhere close to 26,500 - 28,000lbs. So I am probably at a GCW in the mid 30's. Good thing I only tow it every now and then!!
So yeah, I have used it for many things! - Moving garages, hauling equipment for other contractors, hauling my own equipment, as well as dump trailers, race cars and the like.
Pretty much anything. I wanted something I could tow pretty much whatever I wanted, and still be able to have fun when a trailer isn't on the back of it!