I started riding in 1964, worked as a MC mechanic until 1980, then left the sport until 2014. So for me it's partly about nostalgia and what's familiar and appealing to me from the past. To my eyes my vintage bikes evoke the ones I drooled over in the sales brochures back in the day, rode to Baja, raced and won on at the last AFM events at the old Vacaville track, and wrenched on for 15 years back then.
Intellectually I can appreciate the vast improvement in handling, braking, and other refinements of modern bikes, but never having owned one I am ignorant of what I'm missing. But the thing is, I'm having too much fun restoring and riding vintage bikes to care! For me, the simplicity and familiarity of older bikes, warts and all, just add to the adventure of riding and the feeling of intimate connection to the machine....
Struck in the past, not knowing any better, but loving every mile.
-Bill