I love all the Princesses, but Snow is the original Disney Princess. Snow White and the Seven Dwarves is literally the movie that kept Disney from bankruptcy. There's a whole building dedicated to them on the Disney Production lot in Burbank, CA.
I chose Alice because she is my favorite character. I love all her strange adventures and odd friends she meets along the way. I also love the steampunk style, and have for quite some time. It seems natural to tie the two together ( and what fun! )