Well... for what it's worth here are my thoughts on this. I'm 37 yrs old and think I fell into my first crisis about two yrs ago. Since I hate the idea of being a cliche, I've given a lot of thought to the how's and why's of what started this. For me at least, it seems like all the responsibilities that come with growing up: marriage, children and work have slowly put me in one of those mindless drones, similar to the feeling when you're on a long interstate drive and then suddenly realize you're 30 minutes further down the road but have no idea what happened during that time.
I realized that I managed to engage some sort of autopilot dictated by all sorts of external needs. I had all sorts of vague ideas when I was fresh out of college that where nowhere near fruition. It's a crisis of realizing the clock has been ticking. The starting gun fired and I'm still barely off the blocks. Work puts me on the road sun - thurs every week and I ended up in a huge funk, drinking hard, getting more and more resentful.
Then something happened. I guess I realized two things. One, I had such wonderful unexpected things happen in my life. When I was in my early 20's I had no idea how amazing of an experience it is to be a father. Part of my funk came from all the things I was missing with them, but I decided to focus on all the great things we could do as a family. Two, I realized that it wasn't too late to make progress on some of those dreams I had that are still important to me. I recommited to making progress with my side business. I've put together some solutions that have started to create some extra money. That has in many ways led me here. I missed the experience of being on a bike. It's hard for me to put into words, but I know you each know what I'm talking about when I say there is something incredible about being on two wheels. Its such a personal experience, an intangible experience of living... anyway. I decided to make owning a bike a priority. Now, my wife is even interested in learning to ride.
I guess I'm rambling now, but that's my take on the topic based on my experiences, the good and the bad of it.