I grew up watching Disney movies, and because I had younger siblings, I watched them over and over, probably way past the age most girls would quit watching them. LOVE them. Having said that....
What Sapphire912 describes is along the lines of why we've never gone. I was taken when I was 6, but again that was eons ago and things were different.
The cost is staggering (I'm sorry, it seems the "in" thing to do these days, like you, I see tons of people on FB talking about it all the time, I think it's ridiculous to spend that much money on something like that), the lines/wait/wasted time are ridiculous, and to top it off my son has a "thing" about Disney movies. I suspect he'd love it if we ever went (he loves theme parks, water parks, carnivals, etc) but anytime it's mentioned I hear about how he "HATES DISNEY MOVIES!" - he thinks they're either babyish (Cars) or for girls (all the princess movies).
So we have not gone, and may never go. My fiancé wants to go eventually, maybe we'll go for our honeymoon lol. I might consider that. But with the whole family? Just doesn't sound that fun to me.