I am very picky when it comes to the syntax highlighting I use in my IDE while working. Right now I am using something like the Blackboard theme found in http://pastie.textmate.org/ but after reading Slashdot, I found this: Zenburn and I love it!

Zenburn was originally for Vim, but I can’t wait to use it on my Zend Studio!

I am also using Aptana, http://blog.ekini.net/2008/05/10/very-nice-syntax-highlighting-for-aptana/