Whenever I get back into open source, I feel so much more optimistic about things. FLOSS is so contrary to the notion that people are fundamentally selfish. Maybe a lot of people are, but here is a community that loves to make cool things and share them. Where the idea of the greater good still has some value and is not antithetical to personal freedom. You get to feel like your computer is actually yours, not a corporate-mandated data-gathering device, and actually have fun with computing.