I have been a fan of David's since long before he became famous as Illya Kuryakin. While growing up in England,I used to see him on the BBC quite often (I think he was with the BCC repertory company at that time), but the first thing I can really remember is when he played Edgar Linton in "Wuthering Heights". That was 1962. None of my friends even knew who he was, and I didn't meet anyone else who "liked him" until some time later I happened to mention him to a young woman I met through work (I was working in a London publishers office at that time) and found that she liked him too. This was probably 1964 or 5. We are still friends even though she still lives in England and I in Canada.
By the way, the reason David does not have a Scottish accent (although he did have a pretty good one when he played Alan Breck Stuart in "Kidnapped") is that the family moved to London when his father became first violin of the London Philharmonic orchestra and David went to school in London. When you're young, it doesn't take long to lose your accent!
I think I may qualify as David's "oldest" fan.