Having grown up in SoCal, I loved going to Disneyland. In fact, when I was really little I actually met Walt there. What a thrill that was.
But for me, a Disney cruise wouldn't work. The impression I've gotten watching YouTube Disney cruise videos is a constant bombardment of Disney tunes, characters, making announcements when first boarding the ship, etc. Even the ship's whistles play "When you wish upon a star". Maybe I'm wrong but that's the impression I get. I'd hate that.
I can also see why Disney lovers would revel in this, but it sure isn't for me.