I painted my trellis stencil (A stencil that I hand cut... it is not available online for sale) on a client's daughter's bedroom walls recently, and I loved it paired with the pale blue background. Take a look:
I paint each of these diamond like shapes by hand... all the way around the room! It's pretty time consuming. This is a stencil I've considered selling in my Etsy stencil shop... would you guys be interested?