I was born in 1956 and I really don’t consider myself a “Boomer” either. I think generations are defined more by events that define them. The Boomer’s was Vietnam. By the time I turned 18 the draft was over and the war was winding down. College radicalism was on the wane and pretty much gone by the time I graduated. It really was a different experience.
True, being born in your case, in 1956, I think you missed most of the “Boomer Experience” as generally seen by society. By the mid 1970’s, the country was tired from all the radicalism and change of the 1960’s and wanted to settle down into the disco 1970’s.