What Disney movie impacted you the most?
I'm not even sure which "impact" you mean. I think a movie like Snow White has a "base impact" which is not exactly what we mean by "impact." You can "impact" your friend by punching them and leaving them lying on the ground, and they might not forget that event. But if we mean that in some way your friend is unalterably changed as a result of seeing the movie and will remember it forever, I don't see how a Disney movie can be said to have that effect.
The most memorable Disney movies I've seen were The Sword In The Stone and Nine Old Men And A Baby. I loved both of these movies and saw them many times as a kid, so they're very precious to me in a way that isn't captured by saying they "impacted" me.
Tangentially, when I was a kid I read an incredibly poorly written badly researched and clumsily edited book about Arthurian legends that was clearly aimed at children, so much so that it taught me things about the story that turned out to be wrong. But it's still special to me because it was also really interesting and full of fascinating stories and myths and info about the history of the medieval era and I think I read it several times as a kid. By the time I was 8 I'd already read the entire book twice, so I was well aware of the fact that it wasn't especially good. But this just made the experience feel more like a kind of magical nighttime fever dream I was having. It was the kind of thing that was wonderful but was so far outside the realm of the possible that I couldn't tell if I'd read a good book or a bad one in some magical meta-book that happened to look like the other book.