Gave sobriety my first shot at the end of 2006 - so....age 23. Managed five years. Then drank again until 31 December 2016! I'm in a completely different headspace now though (age 33) and my motivations for not drinking are much healthier/better. Confident I can do it forever this time
Prior to quitting the first time, I had been drinking irresponsibly since around age 15. I only really started recognising it as an issue once I was out of university (which has a strong drinking culture in the UK anyway), and in the "real world."