A tricky one, this. While I agree with much of what has been said, there a couple of thing to be wary of in the 'inerests' part of a CV. Piloting might be seen as too individualistic for some employers- they want team players, so might be more impressed with evidence of a group activity. Also, if your interviwer is a 'wannabe', he/she may feel intimidated by someone who has been there and done it. I once worked for a guy who, when he found out I flew, said "oh yeah, I used to do that, but I grew out of it". It was obvious from his 'recollections' that he had never flown as a pilot, maybe desperatly wanted too, and was uncomfortable around someone who was a flyer.
Sad, but there's nowt so queer as folk.
SSD