Let's see...we have two built-ins in the family room. They're about a foot and a half from the ceiling. In one are two shelves of books and the rest is electronic equipment, dvds, etc. The other is filled with board games, dice, electronic games, etc. Oh, and on the top of one is a Vader helmet, Storm Trooper helmet, and some kind of replica of a Star Wars ship. On the other top is a UK signed basketball, and a couple other sports things I can't think of right now...hmmm.
In the living room, we have one free-standing unit that houses mostly books with a few framed photos and a couple of nicer souvenirs (fossils, a NA Kachina doll, some antique opera glasses, etc).