Aerbabe,
I think it all depends on the context and in particular what else you have on your CV, as to how you play it. I have suffered recently from having too much interesting stuff on my CV and the business about 'Private Pilot' and having my own plane and loving to fly it about has, I think, finished me on a couple of occasions.
Always tailor your CV to the job in question and remember that in the last analysis although they 'might' be interested by this stuff, they won't hire you on the basis of it. What they really want is a person who is going to fit into that particular working environment, do the job that is needed, develop as they are expected to and, above all, not be too uppity. Having a PPL and playing that up will probably be just the ticket for the job you're applying for and will probably demonstrate the qualities they want. But, depending on the context both of the rest of the CV and the particular position, it just may not.
Worth bearing in mind.
Good luck!
David