Sigh........I know that change will be forced onto me eventually, but in the meantime I'm driving my 73 Mustang as long as I can.
I do like the hybrids, but they're so damned expensive, especially in regards to repairs. Don't worry, I don't drive it that often, but your in-law's aren't so bad off with their SUV. I get about 10 to 12 mpg in mine, and a lot of the pickups down here get maybe 8.
Disadvantages: Crappy mileage, emissions surprisingly not that bad. Occasionally tricky to find a few of the parts. Fairly loud.
Advantages: Tons of power, lots of cool points, spacious AND luxurious. Plenty of storage space and leg room. Cheap and easy to fix. Good handling, fun to drive.
Good luck with your new car, hope you enjoy the hell out of it.