Definitely Field of Dreams, my dad took me to see it when it came out in the theater and he cried. I have a 4 year old son, every time I see that scene where they play catch I think of him and I'm crying like a baby.
The part where Tom Cruise walks into the Emperor's chambers after the final battle in The Last Samurai, holding Katsumoto's sword, when he says "If you believe me to be your enemy, command me, and I will gladly take my life", kinda gets to me.
The end of Toy Story 3.
The end of Dances With Wolves, when "Wind In His Hair" is yelling above the canyon to DWW, "Can't you see, you will always be my friend". And the haunting music that played, makes me feel like a real beyatch.
Even though I was 9 years old, the one ewok that died in Return of the Jedi.
My wife made me watch The Notebook, miserable depressing movie, a few scenes got me choked up.
The ending to Return of the King, yeah, that got to me.