I'm celebrating 30 days today (whoo hoo!) and have to say I haven't had any physical cravings, yet. For me it was like an off switch, too. But I have had moments, or days, where I think, "Hey, this was so easy ... Maybe I'm not really an alcoholic ... Maybe I can start drinking again."
Those are the dangerous thoughts I need to avoid.
I quit smoking 12 years ago, and the cravings for cigarettes were completely different. They are a physical craving, like I can feel the desire to smoke throughout my body and down to my fingernails. They pass after a few minutes, though. Got those cravings a lot when I first quit, and still every once and a while one will hit me out of the blue. Weird.