What kind do you prefer? Big tall ones, or more manageable short ones. Do you like them skinny or wide? What do you keep on them? I like my bookshelves to be decently sized. for my apartment I like 4 foot tall ones, so they'll be easier to move. But a good big one is nice too. I use my bookshelves for DVDs, and Books, as well as using them to display my figurines.