I, too, like the triskele pin---and tyger's pins!

To see a wide variety, check out some older threads:

Show us your favorite Kilt Pins
Show us your Kilt Pins!

The tricky part about searching for those threads is that "kilt" can't be used as a search term---in this forum, it's too common to be worth indexing, who'd've thought? and words shorter than 4 letters aren't indexed. Remembering that the thread titles involved "show us," I searched for "show pins" and got the two hits in which I was interested.