The "Gen X" nostalgia machine -- selling idealized pop culture memories and "OMG -- I can't believe we dressed (danced/listened to music) like that!!!" cheap laughs to middle-agers whose peak is long-passed in their lives. I had a facebook account for a while a couple of years ago, but eventually deleted it, in large part due to FB being used by so many members on my "friends" list as little more than a nostalgia device: posting 80s videos, pictures of themselves as teens, and "Hey! We haven't talked, and I've made no effort to contact you in 20 years, until the convenience and ease of social media," friend requests.
My adolescence was in the U.S. during the 1980s, and among what I remember first and more viscerally are AIDS, the Cold War, Ronald Reagan, economic recession, resurgent political conservatism and christian fundamentalism, and the pre-internet world. Then farther down the list of recollection are the music, fashions, and media of the decade.
When I speak to people my age who start indulging in nostalgia for their youth and the easily recalled pop culture of the 80s I sometimes will remind them that perhaps it was an "awesome" time for straight, caucasian, conservative christian males, but as with any era (particularly prior to the web), the farther out on the fringes of mainstream society and popular culture a person was, the less there is to look back fondly to.