I learned a long time ago to leave my opinions and pre-conceptions at the door and appreciate the historical thing for what it was and what it said about where we were. There's a really great quote in Ken Burns The Prohibition where someone talks about how we tend to think a-historically (i.e. we invented sex or drug use or mass communication) and how not true that is.
That's never been me. I grew up with an understanding of counter-culture that existed before 1967.
Still sometimes I find things that squick me, create this little curl of unease in my stomach, and make me start questioning things.
Like when I catch myself happily singing this lovely tune down here...