Tartan Etiquette

[Psynister]

One of the questions that I've had in getting started wearing kilts is which tartans should someone wear.

In the research I've done, I haven't come up with a definitive answer so I wanted to post it here and see if I can at least come to some conclusion by popular vote if nothing else.

The answers I have found to this question so far are these:

1. If you don't have a legitimate claim to it, don't wear it.
2. If you can buy it, you can wear it.
3. For casual events or everyday, wear whatever you want. For formal events, wear what you represent.

So, I now present this question to you, XMTS community: Which tartan(s) should a person wear (and when).