I think by the time we're in our early/mid 30s, there's really not much new under the sun in programming. It was all super exciting at 10 years old since I'd seen nothing, by my mid-20s I could build basically everything. Early/mid 30s I have built pretty much one of everything or can visualize a path to doing so.

A lot of what I do at work is the same job of gluing components from vendor A to components ... also from vendor A. Gets a little boring eventually. [edit] This is why I spend more of my time at work doing organizational stuff, people stuff, mentorship and documentation/architecture as compared to how I used to spend my time.

I still have just as much fun with personal projects though.