Lol! Cath kidston is totes amaze, huh. Loving the fact you have made curtains!! That's a brilliant idea :-)
I think the frames idea is a good one. I have a bit of a thing for canvases around the house, but I'm not sure what kind of picture you could go for, with Shabby.
My kitchen it shabby and I have loads of tin signs on the walls. Like old Pepsi signs, gas pump signs, etc.
Maybe you could do something like that, but you'd have to be careful on color, I guess.
Those wall stickers are great, I really like them. Bit fiddly to do, but deffo worth it. I've got a huge one above my bed that says "sweet dreams" :-)
If I have any more ideas, I'll be sure to post them.
However, I think your frames idea is a good one.
xx