My husband and I are pretty lucky, I guess! We're not so different in height, although I have a long torso, so when we're sitting up next to each other, I'm taller. Which means his legs are a *lot* longer than mine. We've managed to reach a compromise position in the minivan, so that I'm a little farther back than I'd like to be, and he's a bit closer than he'd like to be, but it works well enough for each of us that we can just leave it alone and not have to adjust it back and forth. The minivan is my primary vehicle, but he drives it a good bit as well. He also has a car that I almost never drive, so he adjusts that to his convenience.