My friends visit Disneyland at least once a year. They post Disney-related pictures or pins at least once a week. Their children are raised on a generous helping of Disney movies, toys, even Disney snacks. Their children were dressed as Mickey and Minnie, Woody and Buzz, or any of a number of Disney princesses for Halloween.
I like Disney movies. I grew up in the 90s. Of course my family had well-handled VHS tapes of Disney classics. I now have a few special Blu Rays of my favorite Disney movies. But I'm not obsessed. I don't want my daughter to get obsessed.
I hope Lizzie doesn't get to the point where she "needs" a Disney princess-themed room. Where we make the long trek to Disneyland so often that it becomes commonplace instead of a special family memory. Where she only will eat her dinner off a very special Cinderella plate or only sleep in her Rapunzel pajamas.
The point I'm trying to make is that I don't think think anyone's childhood should be defined by Disney. It should not get to the point where there is so much Disney loyalty that even creative play becomes a matter of rescuing Prince Eric and the only songs they know are from the Disney channel. Let Disney be a part of childhood, not the only part.