I see this a lot as an instructor. It's kind of annoying to spend a summer teaching folks how to fly, then winter comes, and next spring they never come back. But I understand that life sometimes gets in the way of model airplanes. I especially notice this with teenagers. At 12, 13, or 14 they're excited to fly, but soon their attention is drawn away by girls, cars, and college! But maybe they'll come back when they get settled in their 30's.