Getting back to the whole tartan thing, there are plenty of other non clan tartans other than Black Watch that can be worn by people who don't have a clan affiliation. The Black Watch tartan isn't just a generic one, it is the tartan of a military regiment, and while I think it looks good, it wouldn't wear it out of principal. As a side note, as cool as is to see lots of people getting into kilts rather than skirts, its nice to have tartan kilts (or at least clan and district tartans) reserved for those of us with a Celtic heritage.