I Think I'm Having an Identity Crisis

More difficult to answer than you might expect, and a question I've been mulling over for some time now: Do I want to have my books published under my real name or under a pen name? I have reasons for liking (and disliking) each option and I haven't made much progress toward an answer.

What do you think about pen names? Do you "judge a book by its cover author name"? Are you more interested in unusual names (especially if the name sounds like it really fits the genre to which the book belongs)? Or does the author's name not matter to you?

In short - when you wander down the aisles of your local bookstore or library, does the author's name have any weight in what makes you pull an unknown book off the shelf for investigation?