Quick Look is a feature of Leopard that more use. It's tremendously useful that you can view the content of images, PDFs, text files ... without having to open the particular program that opens it. You save much time.
While it is true that home, Quick Look is not perfect. When you type 'space' (the key to activate Quick Look) on a directory only shows the directory name, date modified and little else.
Luckily a plugin that has left us with a list of the contents of a directory in Quick Look very detailed. Even gives us the opportunity to show hidden files
1. Download the plugin here
2. Folder .qlgenerator file inside /Library/QuickLook/
3. Go to the Finder and you click on a directory