Here is an interesting home staging tip from Barb Schwarz, www.stagedhomes.com:
Notwithstanding that all personal items should be removed, sometimes sellers overlook the obvious and leave diplomas on the wall. People form biases and can carry a bias too far. For example, the seller might be a lawyer, and there are buyers who might not feel comfortable buying a home from a lawyer. For whatever reason. Diplomas also give away a seller's age or a close estimate. If a buyer sees a recent medical diploma, for example, the buyer might assume the seller is saddled with student loans and needs to sell to pay them off.
We had never really though about this one before, but have observed that potential home buyers do pay attention to these things.