For me, it is definitely Victoria and Alberts. For DH, as much as he LOVES V&A as well, he would pick Jiko. They have an excellent wine selection and excellent food.
We never miss The Crystal Palace for an early breakfast. Believe it or not it's my DH that looooves it so much It brings out the 'kid' in everyone and lets us know we are at DISNEY!!
Cali Grill at fireworks is probably the most memorable experience that one could have in a disney sense...... view of the MK lit at night in the original resort is pretty special...