I recommend that you look over the dinner menus at the three main dining rooms and decide which you would be the least sorry to miss.
In my case on my last cruise, I chose to skip dinner at Parrot Cay (although I did have lunch there, and breakfast) when it came up in my rotation, and went to Palo's.
IMO, especially if you're a big Disneyholic like most of us are, don't miss Animator's Palate....the black and white to color "show" is EXTREMELY cool.
You may also want to consider the dress code (such as it is), and go on your Triton's night. This way, you still only have to "dress up" once.
And it goes without saying that you have to get the chocolate souflee....yum.