I have only owed 1970's bikes and, I don't need to tell you folks but I have that invisible classic connection to them. It started off as the scenario of: .... hey, a cheap bike! I bought one, 20 years ago and 3 bikes later, have never looked back or had the desire for anything newer. The only one, (if you had to put a gun to my head)
that I wouldn't mind owning is the 2nd Gen CB900F (AKA: Honda 919).
I think, because I become so mechanically involved with knowing the bikes, its also a comfort zone thing. why move away from something that, is still cheap to play around with, and that you know how to work on.