Vim.

It indents and un-indents automatically in many cases, has fancy syntax colouring and DWIM.

I used pico, nano, joe and mcedit before I moved to vim. I've tried lots of other editors, including emacs of course, but found them unpleasant.

Juerd # { site => 'juerd.nl', plp_site => 'plp.juerd.nl', do_not_use => 'spamtrap' }