My most favorite car that I have ever owned was a turquoise
1973 Oldsmobile Toronado, purchased in early 2006 for 4,000$ USD from a guy in Missouri. Turns out, the original owner was a low-level mafia guy in Nevada during the 1970s who died in the 1980s. Anyway, it's a great and stylish car, still have it and it runs great. Not to mention, purchased for a great price.
One of my favorite cars from back in the day was a beige
2000 Lincoln Navigator purchased in late 1999 for 50,000$ USD. Great car all-around, but it broke down in late 2007 and was sold to a junk/scrap yard in mid-2010 for around 900 dollars. The only downside was bad gas mileage. This didn't matter in the late 1990s and early 2000s when fuel prices were low, but into the mid-to-late 2000s, as fuel prices rose, let's say the car burned a hole in one's wallet.
I'm currently looking to buy a mid-to-late 1970s Cadillac Eldorado right now, but with the economy being the way it is, it's been hard to find one at a low and reasonable price and in decent condition.
My dream cars that I would love to have for all time would be a
1972 Oldsmobile Cutlass Supreme, and a
1996 Chevrolet Impala Super Sport.