This is what I meant a while ago, about my old 'interesting skirt, black turtleneck' habit...
I only made the skirt I wear today. At least a year ago, maybe longer. The fabric for it was a remnant from a usually fairly expensive seller and, true to form, I wanted to use all of it. And I really liked the look it had when I just draped the fabric around my hips trying to come up with a design.
When I published it on Burdastyle, several people wanted to know how to make it, but I never got around to making a how-to.
Until now, that is. All you need to make a skirt like this, is a basic pattern for a straight skirt with darts. Then, you have to adept the pattern like this (the dotted line marks the hipline):
The sketch shows an normal highth skirt pattern, mine is high waisted, obviously there is plenty of room for variation there. I also made separate waist pieces (with a gentle curve, no point) at the front, just because I like to make sure the front and back have some kind of relation to each other, appart from being attached at sides.
Keep in mind that the wrong side of the fabric will show at the back drape. When sewing the skirt, you have to stitch the center back seam of lower piece first, with the wrong sides of the fabric facing. If the length of the skirt requires a walking slit, leave a piece at the bottom open. Then, you finish the edges of the drape piece (I narrowly hemmed by hand) and sew the upper back piece together. The tricky part come next: attaching to whole thing neatly. No real trick to help you there, this just takes some careful sewing. Once that's done, you can treat it like any other back-of-skirt.