One of the terrific aspects of MIT in those days was the enormous variety of experimental work that either took place there or was talked about in seminars by outside speakers aggressively recruited by the faculty.
I think to just single out a highlight of Elvis's career is pretty much impossible. As far as being a fan of his, a lifetime fan, there were just too many highlights.
By the time a person has achieved years adequate for choosing a direction, the die is cast and the moment has long since passed which determined the future.