Some categories of movies, in no particular order...
Movies to watch when I need a good cry:
I Am Sam
Simon Birch
Fried Green Tomatoes
The Notebook
Steel Magnolias
Up
Movies to watch when I need a good laugh:
Elf
Zoolander
The Emperor's New Groove
Dumb and Dumber
Movies that inspire me:
Freedom Writers
Invictus
Hotel Rwanda
Braveheart
The Shawshank Redemption
Movies I could watch over and over:
White Christmas (okay pretty much ALL of the musicals I was obsessed with during childhood :)
Babies
Legally Blonde
Now and Then
Almost all Disney/Pixar movies
What would you add to these lists? What categories am I forgetting?