In no particular order:
Monsters University*
Toy Story 3 (Especially because it made my big burly man of a father cry like a little girl)
Ratatouille
Finding Nemo
Up
*My favorite part about Monsters University is its timing. Monsters Inc was one of my childhood movies, and when MU came out, I was also in my first year of college. It hit so hard in the nostalgia, and it was like seeing one of my childhood 'heroes' go through something that I was going through at that time too.