Never meet your heroes.
Amen. It can be a big letdown.
Leslie West - most unsociable in the '70s. Then his bass player blew up my Acoustic 360 when they rented it. In 2000, Leslie had become far friendlier.
Zal Cleminson - I saw him with Nazareth, and approached him as a starry-eyed fan (in my 20's by then), and was quickly disillusioned.
The guys you don't expect can be really nice. At the same Nazareth show was an opener that was up and coming. They sounded just like their record at an outdoor gig. The singer, some guy named Bon Scott, and I drank beer and talked on the riverfront for about half an hour.