I just noticed this while talking to another developer. We all seems to have a specific focus that really intrigues us. For example, the developer I was talking to really enjoy Dev Ops. I honestly couldn't care less.
Now that being said, I think it's awesome what he can do with it. I, on the otherhand, would rather have it as a tool than something I would spend time building.
I think the more I look back on the body of work I've done. I really enjoy front web development. I find CSS tricks, JS libs for long shadows, and mobile performance a lot more interesting.
So I wonder, what piques your interest as a developer?