I enjoy using Ubuntu (sans Unity) and think open-source software will, and should, play a more dominant role in normal people's lives, but I am far from a Linux advocate. Or to put it another way, I'm more like a Linus than a Stallman.
Perhaps I'm the only one amused by this, but my most popular answers relate to opening magnet links from a web browser.
Most recently, I've been trying out i3, but I think I'll stick with Awesome as my main environment.
Q&A for Ubuntu users and developers
Q&A for people studying math at any level and professionals in related fields
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for academics and those enrolled in higher education
Q&A for professional and enthusiast programmers
Q&A for finance professionals and academics
Q&A for computer enthusiasts and power users
Q&A for professionals and students of engineering
Q&A for power users of Apple hardware and software
Q&A for professional mathematicians
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for active researchers, academics and students of physics
Q&A for Graphic Design professionals, students, and enthusiasts
Q&A for user experience researchers and experts
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for scientific skepticism
Q&A for science fiction and fantasy enthusiasts
Q&A for members of the workforce navigating the professional setting
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Q&A for professional programmers interested in conceptual questions about software development
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Q&A for people practicing or interested in Buddhist philosophy, teaching, and practice
Q&A for those who study the creation and solving of puzzles
Q&A for people looking to bypass life's everyday problems with simple tricks
Q&A for speakers of other languages learning English