Beofett suggested we do an all time favorite question and answers post.
So I'll accept any question or answer that was asked since the beginning of the site. It doesn't have to be the most up-voted one or most viewed. Maybe it is the original question / answer that got you involved on the site. A brief explanation of why it is your favorite would be helpful.
The answers will be compiled into a blog post similar to quarterly posts. The end of the quarter is coming up, I might still do a quarterly one or maybe I'll just skip it in favor of this one. Only Time will tell (and Time is being pretty close lipped at the moment).