I agree with most all the comments here and would offer one additional observation. Female FFs (Flyertalk members excluded, of course) do not seem to pursue the "mileage craze" as much as male FFs. I have heard comments from a number of female colleagues who travel quite frequently, that they "cannot be bothered" with tracking miles/points. While they gladly offer up their FF#s at check-in, they do not seem to pursue many bonus opportunities. Anyone else observe a similar pattern?