It's never easy telling a client that they need to change something about their house--the ultimate personal space--in order to make it more appealing to others.  It's a necessary conversation, though, and I focus on highlighting the positive attributes of a property as opposed to criticizing their decor and other personal items.    Sometimes, asking them to picture where their items will go "in the new house" helps them see past the change.  I love it when they start to make the connection that the space itself (and not the stuff in it) is the star of the show.