Nicotine, caffeine, simple carbohydrates. (Didn't even realize the last one until I started getting hit with withdrawal - I've never been addicted to sugar before. But since I've cut it out of my diet this last time, which I've done many times before without issue, I've started getting splitting headaches that are rapidly remedied by eating an orange.)
I have alcohol cravings from time to time, but I'm not addicted, since drinking is actually infrequent for me, and not doing so doesn't cause me any issue. That's another recent development which is making me consider clearing out the liquor cabinet. (I did have alcohol cravings once before, after my grandfather died. And my grandmother just died after a few years of progressive decline - she had a form of dementia, possibly Alzheimer's - so it may be depression. I don't -feel- depressed, but I didn't feel depressed last time I was, either, and it was only obvious in retrospect.)
Thanks for writing that up. I probably should have realized that cravings can vary a lot for individuals, but I hadn't thought about it. I've also never heard of a sugar craving which manifests as headaches-- my impression is that typical sugar cravings manifest as obsessive desire without more obviously physical symptoms.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.