Lisp (specifically, I've learned Common Lisp). The power is amazing, being able to have code write code was something I didn't realize I was trying to do over and over in different languages, but to have it all just be code....amazing. And the parentheses are also great, just a simple syntax and auto formatting with a decent editor.
Which brings me to Emacs. Still learning and being amazed at what can be done in there, the more of my computing life in there the better it gets.
