I've been using social media to "talk shop" without bragging, and it feels great. A great example of that is the brr.fyi blog.

Basically, it's a way for me to talk about what I do, get feedback and vent despite normally working alone. My twitter is a casual look into the details of my work. I enjoy the sort of discussion it fosters.

Likewise, I love when a blog post of mine starts a big discussion on HN. It's a good way to find my people.