I'll be honest: my twenties and thirties were a blast. As an incorrigible nostalgic whose youth is fast receding into the past, I'm embarrassingly often grumpy about the thought of young people having unbridled fun while my weekends regularly consist of trips to IKEA and drilling holes in walls. And yet it's sad to learn that for the current generation of youngsters, at least, the fun seems to be over, owing largely to increased economic pressures. Here's hoping hedonism is soon once again affordable. In some respects, I don't have much to show for a large period of my life, but what I do have are memories and friendships that endure - and so no regrets.
(Thanks to Adam for the link.)