[brutimus]

I'm a Mootools fan myself. I use it over the seemingly more popular libs like jquery because very little of my JS code is actually touching DOM. I usually start my projects by creating all my "classes" (actually prototypes, etc, but classes make sense to most OO people).

I primarily code in Py, but I do really want to sit down with GWT some day, it looks badass.

In a lot of my projects I just use raw JS. Big libraries scare me sometimes and honestly, JS isn't that hard if you know what you're doing and know how to code around the main browser issues. I like some of the functional paradigms from mootools though (well any other lib for that matter), and the XHR handling.

(sorry I didn't really answer your question -- just rambled a bit before I go to sleep)