Amanda, There is this thing about white. It's so clean and so fresh. I know some people find it cold but if you accessorize the right way I think its the opposite... a warm, inviting colour.
Anyway, I was making all the beds this morning (one of those fun tasks that i do just so that i can enjoy the feeling of climbing into a made bed at the end of the day.) And I realized there was something consistent about all of the beds in our house: a white bedspread. Each room has one and they are all different, but all white.
I've tried different duvet covers in various colours and they never work for me. I also have only white mugs in my cupboard. So maybe it's just my thing...