How does one choose?
I always thought to be in the Book Depository, then on the grassy knoll, then in the Warren Commision hearings.
But how to not want to actually see a dinosaur, or a Wooly Mammoth, or witness the first step on the moon, or a Neanderthal/homo sapiens interaction, or... I could go on forever, and bore you to death.
If I could interact with them, I'd like to interview my three brick walls in my ancestry (one has been developed with possible DNA links, but I consider this line to also be only a possibility.) Find out if the rumors are true, find out what is the truth. Discover what their lives really were!