My work truck is a 6.4 PSD, and I love it, it is a beast. That being said, my personal truck is an 06 F150 scab 4x4, and I wouldn't own a diesel for my own use, unless I started towing a lot more than I do now (I can use my work truck for personal use, so it is a moot point). This weekend I've got to haul a 92 explorer about 80 miles, and I'm gonna use my F150. Plenty of truck for most towing, as mentioned above they are rated now to tow what the 3/4 tons of the early 90's were.
One of the reasons I don't have any interest in the Diesels is maintainence costs. I have to change the air filter and fuel filter every time I do the oil (5000 miles), and I can see it get pretty spendy fast. My 6.4 holds 15 qts, throw all the filters in with it, and your well over $100 every change. And if you do have to put it in the shop, it's also high dollar. I'll stick with my 1/2 ton.