My cravings have transcended nicotine.
I was sitting here at work thinking that I could really use a cigarette, so I decided to delve into the craving a bit... what do i want from the cigarette? something in my mouth? I've got chewing gum and toothpicks, and that seems to work well enough. Nicotine? I've got a patch in my wallet that'll deliver that no problem, and yet it doesn't seem appealing at all. What I want, what I crave, what I'm fighting to ignore, is the smoke. The warmth, the slight burning sensation, the toasty flavor, the slightly bittersweet aroma of burning tobacco entering and subsequently leaving my lungs.
So in short, all of the other chemical and carcinogens, not the nicotine.