I tend to use whatever I get from dungeons as glamour pieces. Those pieces feel truly unique to me because they are hardly ever used for glamour as far as I've seen. I actually went out of my way to get matching glamours for healers and mage dps, with the only difference being the color palette used (Plaguebringer and Plaguedoctor coats are a pain to farm for btw).

That said, my current mage dps glamour uses the Yaefemi Coat of Casting, which I hadn't seen much before I used it as a glamour piece and suddenly pops up way more than I'd like and makes me feel less unique. i'm considering just switching back to my old glamour because no one I've seen is using something similar and I look damn cute in it. >_>