If there's anything I hope to be, it's a student. StackOverflow appeals to me in the same way Slashdot once did: it's a constant stream of new terminology I can almost, but not quite, understand. As I acquire mastery in one area, a new item of interest begins inspiring questions and further opportunities to learn.
The majority of questions that I answer, I look up the answers and learn the subject with the asker. This may make my information inexpert on occasion, but it means I always check my work for correctness and often provide references that I used to research.
Q&A for professional and enthusiast programmers
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for system and network administrators
Q&A for user experience researchers and experts
Q&A for Ubuntu users and developers
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for power users of web applications
Q&A for pro webmasters
Q&A for academics and those enrolled in higher education
Q&A for power users of Apple hardware and software
Q&A for professional programmers interested in conceptual questions about software development
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for computer enthusiasts and power users
Q&A for members of the workforce navigating the professional setting
Q&A for people studying math at any level and professionals in related fields
Q&A for passionate videogamers on all platforms
Q&A for Muslims, experts in Islam, and those interested in learning more about Islam
Q&A for programming puzzle enthusiasts and code golfers
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Spanish language
Stack Exchange Network staging zone, where users come together to build new Q&A sites