At least if this old article I just came across is any sort of accurate guide:
According to a controversial new study, set to be published in The Journal of Political Psychology, the bedrooms and offices of liberals, who are generally thought of as open, tend to be colorful and awash in books about travel, ethnicity, feminism and music, along with music CDs covering folk, classic and modern rock, as well as art supplies, movie tickets and travel memorabilia.
Conservatives, on the other hand, tend to surround themselves with calendars, postage stamps, laundry baskets, irons and sewing materials in their personal spaces, according to the study. Their bedrooms and offices are well-lighted and decorated with sports paraphernalia and flags—especially American ones.
If this is true, I'm the biggest liberal ever. My room looks exactly like the "liberal" one and absolutely nothing close to the conservative one.
However, I suspect most of these so-called personality tests are total bunk.