I could tell you about the cross-stitching, quilting, baking, crocheting, sewing, flute playing, and bicycling I used to do. I could even speculate about the reasons I don't do them as much anymore. But I think that's how hobbies are. You do them for a season, then move on to something else. With each new experience, life becomes richer. Richer because of the people you meet, the pleasure you had, and the outcome you achieved.
I don't have as much time for hobbies as I once did and that's okay. Instead of quilting a bedspread or baking the latest cake featured on the back page of my Cook's Country magazine, I write. That is all encompassing. And I have the best job on the face of the earth :)
The amount of time new hobbies require is a major factor now. If I need to take time out of my weekday to do it, I'll pass. If it's once a week or twice a month? I can do that. It's good to make those new neuron connections in your brain. I still take time for music and I'll be going Contra Dancing for the first time this Saturday. I'll let you know how that goes.
It's part of being alive to look back and say "I used to do that. Whatever happened?" And the answer is simple...life happened. And I'm glad it did.