Update: This was written as I was a pretty ignorant programmer :)
It's simple. LESS and SASS are both great, but they both lack seamless mixins. LESS lacks
rgba(#HEX, opacity). That said, LESS is the worst of them all.
In my opinion, Stylus is superior to both of them.
Yes. Like this: (docs)
The result is:
I prefer the css-like syntax. It's backward compatible and easier to pass-on to a non-initiated.
But I love Compass!
Me too. I adore it. Stylus has Nib as a replacement.
It has most of the useful stuff from Compass.
Pro tip: use Stylus.