Techie: LAMP, MySQL,Perl,PHP,Vim,Zsh,Cygwin
Being an "Expert" in your own small pond is kind of lonely when you get stuck yourself so it's fantastic to have access to even more expert people at Stackoverflow
Q&A for professional and enthusiast programmers
Q&A for professional system and network administrators
Q&A for computer enthusiasts and power users
Q&A for enthusiasts and power users of the Android operating system
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.