Getting rid of stuff and having some plain walls without pictures has a clear spare feeling for me.
Hi breton. You should see my walls. White. One wall has a white board. Another wall has a couple small mass-produced master reproduction (got them at the Impressionist Museum in Paris...for free...statute of limitation is probably up) and a speaker. Another has a mural, a CD/DVD cabinet which is held to the wall with screws, and a shelf to hold a center speaker and my Don Quixote and Sancho Panza wood carvings. Another has the other speaker. And that is that.