Initially, during the first week or two. It was my "mourning period" - my brain, rebelling against the change. I was preoccupied with food for the first week or so...but it passed, because I recognized it for what it was. I'm six weeks out now and I'm recalibrating my brain to have NEW favorites.
No because eventually you will be able to eat anything you want, so really, no point.
Now that said, I used to love rice and ice cream. (Not at the same time.) Both now make me dump. Because they make me feel so horrible, I no longer WANT them. It's nice, actually.