I haven't met somebody like this, but I have met the complete opposite. There was one girl that I was acquaintances with in high school that quite literally lived and breathed everything Disney... it was almost like a trigger word for her or something. Her greatest hero was Walt Disney, all of her favorite songs were Disney, and every project she did for Digital Design, the class we took, were about Disney.
Don't get me wrong, she was a very nice girl and gifted when it came to digital artwork, but...
wow, she could talk up a storm about it. I always thought that I was a huge Disney fan and knew everything there was to know for the most part (up until that point, I was always teased for my great interest in Disney), but she certainly proved me wrong. She actually spent an entire class period talking about all of the ghostly characters featured in The Haunted Mansion and, much like you, I wasn't able to get a word in about the subject.
Anyway, all she ever seemed to talk about at school was Disney, and all I ever saw on her facebook would be links to Disney songs, clips, or statuses about Disney. She told me that she wanted to work for Disney, and I asked, "Oh, as an animator or something?" "No, I want to be a cast member!" "Oh, cool!" All I can really say is that she must be super dedicated if that's what she wants to do for a living, as I've heard a lot of unpleasant stories about being a cast member at one of the parks.
I'm not trying to be condescending in any way, I actually think it's amazing that she's this into Disney, but in my opinion, she seemed like the kind of person who's
really into Disney... maybe just a little too much.