Suggestions on this HGTV webpage include corner and casement windows, also dormers and skylights. Link: Window Treatments Don't Have to Be a Pane : Decorating : Home & Garden Television
I confess that I mostly use tab curtains on pressure rods. I hate rods that fall out of the wall taking part of the wall with them. On the other hand, a windy day can bring down curtains on a pressure rod. And I use insulated curtains 'cause here in Florida, we have to keep the sun out!