Last week, I made my first-ever pull requests to two different open-source projects that I've been using for a while in my work. Today, I received notifications that both of my contributions were accepted and merged into the main products. It's a great feeling knowing that the improvements I suggested are now available to tens of thousands of developers.
It's a cool way to deliver value, not just through my own products, but by contributing to tools that the broader community relies on.