Constantly using various recreational drugs. It's actually not something my wife has a problem with at all, and even recently she encouraged me to keep doing so. The decision to stop was my own. There have been many extended periods of heavy use and total abstinence in my life already, and I wouldn't change that. In general it's a habit that I have good control over, and one that has never jeopardized my physical wellbeing. Emotionally, psychoactive drugs can have myriad effects, but on the whole they have influenced my personality in remarkably positive ways.
No meth or heroin for the last many years. I never liked either much anyway. I've referring mostly to psychedelic drugs and marijuana, which normally are considered soft, but I've consumed them to a degree that would probably shock most people.