I suppose, statistically speaking, one would be able to generally deduct pretty well the typical personality of a person simply from what car make forum they spend time on.
Vintage 911: Family guy well past his prime.
Corvette: Youngster with no family yet but fighting the competition and hormones to make a manly enough impression for finally being able to score. Once succeded and a couple of years down the line - see Vintage 911.
How is that for premier pseudo psychology rant.