Such a boring topic but I really know nothing about curtains. I was thinking how hard could it be but now that I really start thinking about it, I don't even know what materials look good. Does anyone have any practical advice when buying curtains? Like whether you should always buy the best you can afford? How can I ensure black out curtains are as dark as possible (are there different levels of lining?)? What kind of rails are best? etc. I need curtains for 4 bedrooms and 2 living rooms with high ceilings and sash windows. Will probably just get blinds for the kitchen and play room.