I have very few regrets in my life, and I only regret selling one vehicle. That was my 1965 Pontiac GTO. Crappy brakes, poor handling, and sucking gas like a pig, but it was a great ride and now is a highly prized possession by many muscle car collectors. Modern upgrades to the brakes and suspension can make it a great road car. With modern engine technology it could easily get about 24 MPG and have even better performance.
I was never a Pick-up truck fan, but always said that the Sport Trac was the only pick-up truck I would ever consider owning....and I had two of them. After 8 years of owning Sport Tracs, they no longer fit my life style and I moved on to a Luxury/Sport Sedan, and a smaller SUV for when I need more cargo capacity.
...Rich