My winter drapes would be a romantic and luscious velvet like Ashley Wilde Alaska in a bold colour, such as Emerald or Teal.
Yes velvets are very much back in fashion and there are different weights and styles on offer from many of the fabric houses. There is a range of wild colours, such as soft buttery creams through to vivid jewel-like hues that only a velvet can hold.
If velvet drapes are a bit more than you can handle, consider a couch, an occasional chair or even a cushion (or 12).
The one item that would stay all year round would be the newest Hardware available; The Patented Perfekt© curtain suspension system from the Rufflette brand. Elegant, streamlined tracks and rods that have powdercoated components so the end caps and brackets are all a perfect colour match and will stay that way over time. So handsome they will take pride of place over every window all year round and for many years to come.