Wow, Omak. You're wide awake this morning! :D Thank you for the ideas. I am warming to the tree idea and I've looked at a few old patterns. The vase does add an "artificial" element, if you know what I mean. I really do like it though.
I have some time to decide as I ordered 6 yards of a different background fabric from the collection. I wasn't thrilled with the wavy beige when I saw it in person so I ordered the tan with tiny dots (not circles) like the blue and red fabric.
A flag in the center would be a pretty solid design and I think I want it more open.
As for the guest quarters it was funny when my DD and her husband were here. She told me he went into the upstairs bathroom and saw how I had fixed it up after they moved out and said, "Can we use this bathroom?"