I'm a LaTeX enthusiast (who still has loads to learn, though :) )
I really like the LaTeX3 programming language expl3 which makes LaTeX programming so much easier and more intuitive.
I'm the maintainer of a few mostly chemistry related LaTeX packages such as chemnum or the chemmacros bundle about which I report on my blog www.mychemistry.eu.
Any code of mine that I publish or have published previously on the TeX.SE main site I hereby relicense under the WTFPL.
Useful links:
Top Questions
tex.stackexchange.com
german.stackexchange.com
