I think warsigmar is right to divide the W6 history into eras. For the early phases, CHE!!! definitely ruled, and their clinging on to the vestiges of power, and affecting the status between STACHE and KoD was awesome. Also, BH is noted as one of the best, if not the best, duke of w6. However.... I was in CHE!!! for a couple of days, and I was not impressed with some of the things they did. My criticism got me an open invitation when BH came back, thanks for that BH
After that, tribes started to fight for Ks in earnest. This could be called the second era, and for that one, i would nominate either RIM or STONED. STONED came up a little earlier, and earned their rep for sure. I suspect we had a bit more fun ripping other tribes in ahlf, though.
For the third era, the one of the massive tribes covering many Ks, it would be STACHE and OSIN. I`ll go with STACHE because the people I knew there were generally great people to talk to, whereas OSIN has its share of vinegar pissers (no offense, you guys just don`t make me laugh).
I guess, on the whole, it`s STACHE for me.