I never close my curtain.
We don't have blinds or curtains that close. Just a valance above each window.
I have both.
Curtains are open blinds are closed.
I open the kitchen and dining room blinds every morning. Close at dark.
Blinds are usually closed.
Most of the house the blinds are always open. The only ones I close at night are in the bedroom. I open the ones on the French doors when I get up, but the ones on the windows stay closed to keep the heat from the sun out. I will open them in the winter though.