I use it for grading assignments (reading a .lisp file and writing a grade.txt file), as well as taking class notes. I also use it for editing config files (like for nginx) and dotfiles.
Taking class notes sound interesting. I want to move some of my stuff over to command-line like TODO and simple writing for distraction free environment. I am using Google Docs and Evernote at the moment but a combination of vim/terminal and Dropbox would be great.