I can relate to so many posts in this thread. My glycemic index has been tested several times over the years, and the results have always been fine, even back when I was drinking heavily. It was tested again several months into recovery, same thing.
I started craving sweets quite heavily soon after withdrawal, especially sodas. However, I soon noticed that I couldn't tolerate high amounts of sugar - the sugar rush was very unpleasant, and I got a "sugar hangover" the next day... So I switched to diet/sugar-free stuff.
Ironically, at the moment my diet is much worse than it used to be in the past... I've always actually enjoyed boring healthy foods (salad, legumes, veggies, etc), but no longer go out of my way to get a balanced diet - there's definitely room for improvemnt, hmm New Year's resolution maybe.