My favourite thing about 'dreich' is how often people hearing it for the first time just... get it. The word sounds dreary on its own.
Edit: From the comments on that BBC article:
Glasgow woman sits in the dentist's chair.
"Comfy?" says the dentist.
"Govan" says the woman.
Edit2: When I was a child I would have asked where someone was from by saying: "Far are ye fae"....