@erick1332 - I guess my definition is a little vague. I'm talking about seriously mind bending substances that you would do ANYTHING to get hold of. Sure coffee might give you a buzz and you would have some physical kickback if you went cold turkey but nothing along the lines of sweats or vomiting or dropping blood pressure.
@lastbabyboomer - now if I were you, as a service to humanity I would write down my exact reasons as to why I started and how I kept going. Seriously I think that some junkies could benefit from your knowledge (no snark I promise.)