@Wicked Deeds This is a really good question.
For me, I think part of the reason is that it is something I have never done on my own (I have released band albums but they're not the same).
In life, I like to push myself and set challenges. When I was a kid, it was to represent my country at table tennis, which I achieved at the age of 14.
Let later it was to release a CD with my band. I quit music at 40 and started playing table tennis again, so I set myself a challenge to get good enough to play for Yorkshire, which I did 2 years later.
Now, at the age of 50 my challenge was to write, arrange, record and release an album all on my own, and I did that too.
I get a sense of satisfaction achieving difficult things. And when people say nice things about the music, that's the icing on the cake
And I think the reason I keep on with this now is because it is extremely enjoyable.