[tannerj]

I started with LESS (Bootstrap) and couldn't make the column gutters collapse. I did some research, found that I could do that in Zurb Foundation so I started using foundation. It was that simple difference that caused me to go with SASS over LESS. I actually wasn't doing anything custom in either framework at first, but once I wanted to start customizing the framework I started learning SASS and really like it. I've also been learning ruby/rails and it's nice that its written in the same language. I've now dropped the idea of a huge framework and have been learning compass and susy with sass and I really like that solution as opposed to an entire framework. I think both LESS and SASS are great and valid solutions to the problem. At this point it's just preference.

edited for clarity