It's 30 years of GNU -- 30 years of freedom and 30 years of owning one's computers. I can't imagine a life where I don't have control over the software I run. I'm going to be eternally thankful to RMS and Linus for starting the mass movements that have not only transformed an entire industry, but also shaped my thinking and my career.
A few Red Hatters (including yours truly) have shared stories of their first brush with free software here -- give it a read, it's a good trip down the memory lane, as well as some inspiring anecdotes from people who have been involved with free software for a really long time.
Here's wishing everyone a liberating Software Freedom Day (Sep 19th), and many more years of freedom to everyone!