Y'know, maybe I read the original post wrong. Is the question "what was the hardest substance to detox from" or "what was the hardest substance to stay away from for good"?
Because booze was hella hard to detox off of, no lie there, but cigarettes were darn near impossible for me to stay away from for good, even though, like Mark Twain said, "quitting smoking is easy - I've done it a thousand times". I've been smoke-free for many years and I still occasionally find myself on autopilot, looking for my lighter...