I like Stack Exchange's websites network because it's so well designed and SEO-optimized. Therefore, I spend time to the community to help people on webmastering issues, to improve formatting of many posts to keep this website clean, etc.
I am the first Steward and Marshal of Pro Webmasters :-).
Otherwise, I love making websites with WordPress, HTML5, CSS3, JavaScript, jQuery... SEO is also a good stuff.
I support these two projects: GitStack (git server for Windows) and CamSwipe (credit card OCR for mobile).
My profile on Stack Exchange's network: