I don't know what it is about drapery but I love it. Love. It. When I see well done drapery drawings I just want to reach out and touch it. Feel it. Hold it. All that layered, luscious fabric. Maybe it's the seamstress in me that has a tactile connection. Truly, I don't know why, and really, I don't care. 
I just do. I know my little drawing above looks weak next to these below, but I still attempt fabric.

Here are more of my attempts with fabric. In paint.