HI
For me it was sheer coincidence...
In my youth I drove some mopeds and then upgraded to an MZ 250 trophy sport

, then along came a girlfriend, later to be my wife, after a few years on the MZ it was kids and cars, the MZ in a corner and eventually sold of. My older brother had a Triumph Tiger 500 around same time, he also went the wife, kids and cars route.
Thirty years later and the bike bug was still nagging, and I began to end all conversations with the wife: "I wish I could afford a motorcycle". She finally got tired of this

, and suddenly told me that one of her collegues had a motorcycle for sale and did I want to have a look at it?. We went around to his place, and there it was, an A-10 Golden Flash, love at first sight and first try! Not quite original, but quite useable...
I had absolutely no preference for BSA, but after getting active in the Danish BSA Club, and local Uk bike club I enjoy it very much - and have a preference now.
By the way my older brother and his wife are now into Virago'es, not my cup of tea, but always makes for some good conversation between brothers

regards
Joergen