your eternal vehicle choice...

http://www.topspeed.com/IMG/crop-405x340/Audi_A6_2006_2_jpg.jpg

One car forever? Would have to be a wagon. More useful than a sedan, handles as well as a car. Mid-sized because I’d outgrow a compact. AWD because AWD>RWD>>>FWD. Audi A6 rather than Subaru Legacy for the luxury/interior.