At work we are forced to spend some of our free time writing "commercial interesting" articles mostly of topics that doesn't say a lot to me. It's something that I (and a lot of my coworkers) dread a lot.

On the other hand I have my own blog where I have the freedom to write about what I want and when I want. I'm having a lot more fun when writing for the latter.

I also get a lot more reactions regarding articles that I write for my own so I assume that fun or interest also shows in the quality of my writings.