I was very curious to read this thread, as I'm currently a University Student so still have CV's to write in the future. I do not know anyone around my age who researches ancestry, I often get the impression that people around my age aren't interested in ancestry, which seems a shame to me - the things I have been able to tell my parents and grandparents, who aren't as comfortable with computers as myself, about their ancestry never fails to make me smile - it's truly a rewarding hobby; and on many occasions, sitting with my grandmother telling her about the people she never got to meet, has been an amazing experience - we have laughed and cried together, and I am so glad that I took it up at this age.
I hope that I will be able to mention my ancestry researching on my CV's, as it has certainly helped develop many skills for me - all the skills that you all have mentioned, plus it has helped my communication skills, as contacting a variety of people on a regular basis around the world is a common theme for me now. I certainly don't think it's a bad thing to research ancestry, I just hope that other people won't have negative presumptions about it.