Great Question, very thought provoking.
Before I saw JD's answer, I too would like to hang out with the Founding Fathers, pick up a weapon and destroy the enemy.
Simply based on the question, it say's "Meet anyone from the Past" however, following JD's lead, it appears that you would be able to time travel with your current knowledge. I know, I am too specific on wording. 1) Blame my mother, school teacher, English and Reading Tech for 30 years, 2) Blame the Army ! Follow the Orders exactly as given, do not deviate from the plan.
I would also like to meet the "Rock Heads"
if they could talk.... So I could get a perspective from several centuries.
I would also go back to the time of Christ, here I will probably "bother" some people. I appologize in advance.
I do believe a man named Jesus existed, as for the other stuff ? I'm not convinced.