I've been a sales manager for a new car store(s) for going on 30 years. I LIVE this business, and have driven pretty much everything you can think of.
Fact is, the big three all make pretty good trucks. Each has plus's and minuses. You've just gotta pick what works best for you.
I've always said the Dodge has the best engine. That Cummins is pretty dam hard to beat. It'll get the best fuel economy out of all three, but as has been said, it has the weakest tranny, and the truck itself is STILL not up to par with the other two.
The GM trucks have always had a great ride. "Great" being the most plush.
I'm not into plush when it comes to my truck.
Since '11, Ford has had the best truck overall IMO. The resale on a well equipped 6.7 F250-350 is unreal.
I've always been a Chevy guy. Had numerous Silverado's over the years.. but 17 years ago, the wife wanted more power to pull the horse trailer.. The Chev's and GMC's back then looked wimpy.
I'm one of those guys that bought a new Superduty in late 2003 with the 6.0. At the time, it was quiet, made great power, and had a good rep. That didn't last long.
However.. MY luck was excellent. I got rid of the EGR at 90K, put a tuner on it, and then cringed every time I hammered it (which was often cause it ripped!) because I knew I should put head studs in it. I didn't. I ran it to 120K and sold it. Best dam truck I ever owned.
Which is why I replaced it in '14 with a new F350 6.7 Platinum. Absolutely LOVE my truck. I don't give a sh!t what I hook to it, it pulls it with ease. Love the tranny, great engine braking downhill.. love the amenities, (cooled seats ROCK!) and the best part?
I have 29K on it now, and could easily retail it here in the PNW for 50K. The retained value is insane. Don't get me wrong, the GM and Dodge 3/4 + trucks do well too.
Pick what you LIKE. They're all pretty dam good. Do your research. Be educated.
**Edit; We just sold a '13 F350 6.7 shortbox crew. Lariat Ultimate pkg. Super nice truck. 74K on the clock. Sold in 3 days for 42K. Do the math.