My first car was a 73 Ford Maverick (aka Ford POS). Unfortunately there was absolutely nothing you could do to look cool in that car 🙂
These days I do tend to sit more upright, because I know my natural posture is a “male” slouch, which I hate. I also tend to play with my hair and wave my hands about a bit more as I’m driving. Not exactly sure why, though I think it may just be that I tend to be more relaxed when I drive as April. That seems counter intuitive to me given my slight fear of getting pulled over by some angry Neandertal cop, but nonetheless, it’s how I feel.
I also always sit fairly far back from the steering wheel. I really don’t like the feel of sitting close.