I was born in 66, my first visit was 70 I believe but my earliest memories are the very early 70's. Probably my favorite period was 74-79. The 1967 tomorrowland was still pretty new, America Sings in 74, Space Mountain in 77. An amazing few years of revitalization for the park.
After that it would be 2005 for the 50th. An amazing job by Matt Quimet and Team.