Would say I'm most dependent on alcohol, even though I only drink on weekends I kind of come to expect that I'm meant to drink at certain times. Never had that problem with crystal meth, amazingly. I used to smoke cigs and that's addictive in the sense that you think of it as your little treat, at whatever time or setting you anticipate smoking, and if you don't you'll be pissed off and will have trouble not thinking about having one. Physical withdrawals were non existent for me when I quit. Everyone's different though, I guess.