Personally I love them because I like to have something to do with my hands while I'm watching movies or television or listening to audiobooks or podcasts (I often think I should pick up knitting, but I find that I can't pay attention to a movie and to knitting at the same time.). Since I've been trying to watch more movies recently, I've dug into my coloring books and found them perfectly suited.
Anyway, here are my picks for Goth coloring books:
Note: while not especially Gothy itself, Jillian Venters (blogger and author behind Gothic Charm School) also has a fantasy-themed coloring book out which you can get here.
Do you all use coloring books? Which are your favorites?