If you have a lot of windows, you will want to choose curtains that can block out the light. However, if you have a small window or only a few windows, you may want to select curtains that let in some light.
Additionally, if it gets cold where you live, you will want to choose curtains that can help to keep out the cold air.
If you have a modern home, you may want to choose curtains with a more contemporary design. However, if you have a traditional home, you may want to choose those with a more classic look. They can make a massive difference in the look and feel of your home.