GIS Analyst and developer. 50% of my job is Goggling other peoples problems so naturally I love stackexchange.com and gis.stackexchange.com has been invaluable to me. I like contributing to it in any way I can.
Q&A for cartographers, geographers and GIS professionals
Q&A for professional and enthusiast programmers
Q&A for Ubuntu users and developers
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Q&A for beer aficionados and collectors
Q&A for computer enthusiasts and power users
Q&A for system and network administrators
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.