Hello and a warm from Boston, Massachusetts.
Wear the tartan(s) that you are happy with. I say go for Grandmother's Buchanan first and then get a MacDougall, followed by any other tartan or self colour kilt that you are comfortable with. For a goodly glue to the computer's monitor, check out the kilt do's and don'ts thread in the kilt advise forum. Plenty of good humour there as well as good advice.