Personally, I like to keep my descriptions short and sweet. Lengthy ones certainly have their place, I just prefer being brief. A short physical overview- height, build, hair, that sort of thing. Then I plug in a few baubles or unique pieces of clothing people may notice. A tabard, medals, jewelry, something that could spark a conversation. Things that someone might walk up and ask, "Where did you get that?"
On my main, my human priestess, most of those things are pins on the collar of her robes that signify organizations she's involved with or support. For example: Her guild, the Argent Dawn, and the Aldor. All in all, her description is about a paragraph long to paint a picture of her and give some conversation inspiration.
Now, here's my request for all of you. Show me your descriptions! Copy-paste them straight from FlagRSP or make one from scratch, it's up to you. Long or short, tame or ridiculous, I'm interested in them all. We might even learn a thing or two from those posted. A little style goes a long way.