Umm...I already know where I want to eat on my Baby's First Trip in 2 years from now. We're talking Fall of 2012. (we'll be out of the country until then) I also have contingency plans based on whether or not we decide to do the Dining Plan.
On the Dining Plan
Crystal Palace
Le Cellier
Hoop dee doo
Whispering Canyon Cafe
Tusker House
Not on the Dining Plan
Crystal Palace
Rose & Crown
Whispering Canyon Cafe
Tusker House
Ohana
I just realized that since at least some of the Fantasyland reno should be done by then, I might want to try the new restaurant there.
For my honeymoon, I told my husband that he needed to propose at least 6 months in advance (we already had the date picked out a long time before that) so I could make dining reservations.
I don't really understand the "I don't know what I'll be in the mood for 6 months in advance" argument. There's the atmosphere thing, but also people act like once you make ADRs you can't eat anywhere else. If I didn't want to eat somewhere, I could just pick up the phone the night or morning before and cancel. I could even check for availability elsewhere if I wanted. Having ADRs just guarantees that I have a place to eat.
I have called to alter times before, but most of the time I don't feel restricted at all by ADRs.