Well I really think Stylus is way faster and kind of similar to python. It allows you to do old school CSS or new free style and also has a lot of cool features. For me what I want and need is to do fast css and stylus allows it. The bad thing about it is that a few people use it and there's not that many stuff made with it.
I see a lot of people have voted for Sass - Now may I ask for the reason(s) why SASS ?
I've only worked with LESS and mostly for variables (definitions of colors and fonts) and mixins (prefixes, returning styles etc.), but nothing more than that really.
In my current job: no preprocessors, so building it all by hand. Luckily Sublime Text with Emmet handles prefixes very well ;)
Denny Trebbin
Lead Fullstack Developer. Experimenting with bleeding-edge tech. Irregularly DJ. Hobby drone pilot. Amateur photographer.
bass.css/postcss or stylus because css3 is already valid stylus syntax (we all have copy&paste developers in our team). and it has its own nice&cute syntax and very awesome features.