All time - Dumbo As a child - The Little Mermaid (someone seriously had to film my dad follow-up from the premiere in my city 6 little girls who were drowned in tears..)
The newest-Big Hero 6
Here's my top 10 Disney animated feature films (not including Pixar films). I've seen 41 in total. I watched some of them a long time ago so it's hard to remember them.
Wreck-It-Ralph The Lion King Aladdin Zootopia Big Hero 6 Frozen The Jungle Book Fantasia (not sure where to rank this one because some segments are better than others) Snow White The Great Mouse Detective
I know I'm a dude but I have to say that my favorite Disney movie growing up was The Little Mermaid. Ariel was my first crush and if I ever marry a woman, I want her to have the same characteristics as Ariel
IMO, some of the best Disney movies are Monster's Inc., The Lion King, Aladdin, The Little Mermaid, Mulan, Toy Story 1&2, Finding Nemo, Return to Oz, Something Wicked This Way Comes, Sleeping Beauty, Beauty and the Beast, Frozen