Foto
I just like the old wallpaper feel! A paisley design is about the closest you can get to that in my opinion. There are so many of them, and I gave it a try in Inkscape as well.

The Very Simple Designs tutorial is nice to get started, but really, once you get the hang of it, just let go and follow your instinct.

It took me a while to figure out how to create a seamless pattern, but in the end I got it, using the allign tool and the clipping tool. Any questions will be answered gladly, but for now I just wanted you to see my result on the left.