I am currently a Unix Admin at a well known British trading fund. I spend most of my free time tinkering with electronics and computers ranging from Arduino's to playing with CentOS on my VPS over ssh from my Macbook Air.
When I work on any project I like to learn by doing and so I find StackExchange perfect for helping nudge me in the right direction when I get stuck and so I try and give back just as much advice as I take.
Q&A for professional and enthusiast programmers
Q&A for Ubuntu users and developers
Q&A for movie and tv enthusiasts
Q&A for system and network administrators
Q&A for people who want to be financially literate
Q&A for power users of Apple hardware and software
Q&A for WordPress developers and administrators
Q&A for computer enthusiasts and power users
Q&A for Information security professionals
Q&A for apps, scripts, and development with the Stack Exchange API
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for professional and independent game developers