I have always had a habit of having big ideas for programs and working on them in my spare time and then getting bored of them when it starts to get tedious. I used to regard these as failures, but recently, I've started to see it in this light.
Sometimes, people have art books and they just draw in there. Not because they're going to publish a comic or anything, but because they like drawing.
That's what I'm doing with my recreational programming.