I used LaTeX when I was in school to create reports, presentation (using beamer) and even sometimes class notes and assignments. Recently when I was looking for a presentation program in Linux I was crestfallen by the lack of polish in OpenOffice Impress. So I created my presentation for the Salt Lake Linux User Group in LaTeX and it looked professional (nothing surprising there).
But that was created on my tiny Netbook running Meego. I wanted to make some edits to it with my wife's MacBook, so I started looking around for LaTeX on Mac. I found MacTex which completely took me by surprise, because the download size of the MacTex package was 1.6GB and the installed size on the computer was well over 3GB. It took me a good one hour to download, install and configure that thing. Seeing the 1.6GB zip file getting downloaded made me realize how much work has gone into LaTeX which I've always taken for granted.
I bow before thee LaTeX.