I was born in the early sixties and I feel like I have some things more Gen X, and some things more Baby Boomer. I feel I have less in common with older Baby Boomers, whose defining things seem to be the war in Vietnam, anxiety about the possibility of a nuclear war, and Woodstock. My defining things seem to be Watergate, anxiety about the economy (stagflation, high interest rates, unemployment), the Space Race, and the beginning of the tech boom (those happy days when PC meant personal computer, not politically correct).
Really, every 5-10 years probably makes a difference for an age group. For example, you wrote:
"My defining things seem to be Watergate, anxiety about the economy (stagflation, high interest rates, unemployment), the Space Race, and the beginning of the tech boom."
For me, in my teens, the big topics were cults (like Jim Jones), the Oil Crisis, and the Iran hostage situation. We really hated seeing our country look so weak. Of course, we all worried about the Soviet Union, communism, and a nuclear holocaust.
Roger that....similar vintage.