I spend my spare (?) time answering my friends' coding, OOD, ASP.NET, and C# questions. So why not on SO? I spend my other spare (?) time reading, cooking, baking, swimming, and playing Doctor with small children (er, my own).
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Programmers
Q&A for professional programmers interested in conceptual questions about software development
The Workplace
Q&A for members of the workforce navigating the professional setting
Personal Productivity
Q&A for people wanting to improve their personal productivity
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Game Development
Q&A for professional and independent game developers
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
User Experience
Q&A for user experience researchers and experts
Server Fault
Q&A for professional system and network administrators
Mi Yodeya
Q&A for those who base their lives on Jewish law and tradition and anyone interested in learning more
Libraries & Information Science
Q&A for librarians and library professionals
Reverse Engineering
Q&A for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation
Biblical Hermeneutics
Q&A for professors, theologians, and those interested in exegetical analysis of biblical texts