Hmm, the way I see it is that side projects usually demonstrate that you have a passion for code outside of your work as well. From a company perspective I would probably also hire someone who is using his free time to advance his knowledge since some of that stuff he is using/learning could also become useful for the company at some point.
I personally don't mean any harm with my projects. I just really like coding, creating things and learning more (my way of learning also being to experiment/build something with technology X). The field is so broad and there are so many interesting things to learn about with new ones getting released almost weekly.