I'm in the same boat. DW has commented on the amount of time I spend planning, and how that seems to be all I think about.
I guess she doesn't know, even after all these years, that this is the way I do things. Whether it's a project for work, a project at home, or a vacation, I spend a ton of time researching, planning, and testing theories. Heck, it's what I did when we were searching for a house to buy - a process she was involved with intimately!
But back then, she was right there with me in obsessing about the homes available, what the plusses and minuses of each were, etc. I still went beyond what she was willing to do (for example, leaving early for work so I can get to a prospective house then start my commute from there to see how long it would be), but she never lost the excitement. Now, though, I think I'm killing her excitement over this vacation.
So I've learned to keep my DIS thoughts to myself and only ask her for input when it's really needed. That's fine, and I know it'll be worth it, but I'm still more than a little sad that I can't share the joy with her. And I know it could be so much more if only she understood!
I'm just hoping that, after this trip, she'll feel as joyful about Disney as I do, so that we can both enjoy planning the next trip. Or at least talking about it.