So, along with my Space Marines, I also collect Tau. Interestingly enough, Tau were the first army I wanted to collect, but peer pressure of "They suck at Close Combat" kept me away. After a while, my buddy had some Tau stuff and i bought it from him and have made it my own.
I haven't developed any major fluff for them, but the concept I have in mind is that they are on a planet with a large amount of water, and the Tau, being the Technocrats they are, have learned to exist underwater. The name came from Weis Markets, my first job. The blue I chose for the Tau was strangely similar to the blue of my work polo. So, i named the Sept World We'is.
Anyway here are some pics: