I'd go back to 2003, easy. It was the year I had the most after-school activities going on, my favorite sports teams were on top of the world, and it was my final year of elementary, so I could hang out with all my old friends again before we split our seperate ways into middle school. 5th grade was also the last time that I truly enjoyed going to school and learning (and was the last time I remember getting close to straight A's), and I kinda miss that feeling.