Heh, if you could see our house you'd know that I'm not much into wall stuff either!! There's an ugly cheap poster type painting in our kitchen that DH likes, some weird print (again DH) over our couch, and Ferris Bueller and Star Wars posters in the office (again DH). Other than that, we've got a couple inherited paintings in our bedroom (again DH) and one random little picture in our guest bedroom (that one is mine). All of those I could do without. DH has talked about lending the paintings to a museum (they are of a locally known deceased artist, so of a small value but still valuable enough to a local museum)...and I could probably talk him into getting rid of all but the original Star Wars poster...but so far they are all still on the walls.
Besides that, I've got a few frames on the wall in Bug's room with his name and a couple silhouettes, a little plaque that was mine as a kid with the bedtime prayer on it, and a bulletin board...all in Bug's room. Then I have a couple bulletin boards over my desk. Those all are keepers for now.
Truthfully, all I really want on the walls (other than Bug's stuff and my bulletin boards) is the picture collage frame for family pictures I got months ago that is still sitting and waiting for pics from the various family members!! The rest can go....though I know DH will keep the Star Wars poster!!
Our Christmas decor? Yeah, those two trees in the pics above are basically it. I have three stockings and an advent calendar on the wall, three little snowmen figurines on the breakfast bar, and a star-shaped tealight on the table....and that's it. The snowmen and tealight and advent calendar are all expendable really...I just keep them for now cause they really aren't in my way for the three weeks or so they are out...and they will be GONE once we downsize to an RV.
It's a bit difficult when my DH likes things clean and simple for the most part, but doesn't really want to part with any of HIS stuff!!