My first visit - my first visit to any megalithic site, in fact - must have been during 1983 when my sister's then husband was stationed at RAF Lyneham. Right on, NOT! He's since history, the sucker.
I recall being suitably awed by the massive stones, but, to be honest, not really having a clue what was going on. Simply too extensive a site. Not that I probably have much more of a clue now, it has to be said, since the Avebury 'big picture's' only really visible from the air, I guess.
Copey's Peggy Suicide photo, followed by the Jehovah Kill sleeve notes etc began a growing interest, but it was not until two visits in 2001 that I finally got to walk around the place properly. Exhausting......