I stopped after college. Honestly, it was because I did a poor job managing my "all in one" PTO system - I never had time enough for a vacation, and I wasn't excited to ski anywhere I could drive to from Virginia. On one of the rare occasions I ventured out for some night skiing, I fell asleep at the wheel on the drive home and hit another car. (Do not recommend. On so many levels. I never want to think, "I just killed someone" ever again. As it turned out, the other driver was fine, although pretty shaken up.)
When I moved out to Colorado, I definitely wanted to get back into the skiing game. The first couple of years were just a few days per season, but it has gradually permeated our lives. The turning point was when we got our first dog, Cooper. We realized that with all the factors considered, we either needed to rent a place in the mountains, or we weren't going to ski much. Once we had the place, everything got easier - we were able to avoid traffic and set the alarm much later, which meant we didn't punt nearly as often - and we skied both weekend days more often than not.
In reality, the gap between when I stopped skiing and when I started again can only have been 3 or 4 years - maybe 5 or 6 if you don't count seasons when I skied a day or two - but it felt like night and day.