The poll is in the sidebar, so jump down there to vote. You can see examples of the different ways to format CSS here. I think that covers most of the popular ways to format CSS, but if you have your own unique way, feel free to post some code or a link to an example CSS file in the comments!
I think it's an interesting topic because us all the implications it may have on a site and the working life of the front end coder. We spend so much time in CSS that how we choose to format it affects how efficiently we can write it, how easily re-acquainted we are with old CSS, and even potentially page loading times assuming you don't compress your CSS.