Well said, fellow dane.
Personally I try to write about things I know, experiences I've had, etc...
I also tend to write about the more science oriented news that come out, anything that lights a spark within me !!
I don't pursue the money, but it does give me a warm glow inside when a post seems popular :)
I try to just write about stuff that interests me, and random ideas that come into my head that seem like they might be interesting to explore further. A few of the things I post end up being "somewhat" popular... but mostly I enjoy the interaction and discussion through the comments section, afterwards.
Of course the rewards are nice but I have never been a slave to writing for money...
That's always a good attitude to have :)