I was 18 when I was DF'd. I went absolutely bat-shit crazy with vices for a few years after that. I experimented heavily with drugs (pretty much all of them with the exception of injecting anything into my veins, thank goodness), took up cigarettes, drank myself into oblivion regularly, got heavily tattooed, and became a bonafide man-slut.
I've calmed down considerably over the last 10 years or so, however. I have a great career, a nice house, nice cars, a beautiful wife, and all that other good stuff. I work in the liquor industry as a whisk(e)y brand ambassador, so booze is part of the job. I keep it pretty much in check though and rarely get drunk. Aside from the occasional puff or two of weed, I pretty much stay clear of narcotics.I kicked the cig habit cold-turkey about 6 years ago, but still enjoy a nice cigar maybe once or twice a week with a dram of good single malt.
I don't have any regrets though in regards to my past habits. They have all made me the man I am today, and I'm pretty happy with who I have become. I wouldn't say that I am currently a "bad boy", but I sure used to be.