Calling all directors and helpful friends...

Okay, everyone, I've been asked to supply a photo for a large poster that will be displayed in a bookstore (!). So we took a bunch of photos and narrowed it down to these four.
What do you think? Should I go friendly like the top ones (with/without glasses), or more author-y like the lower ones (with / without glasses.
We all have a different favorite, so please help! What do you think? We'd appreciate some input... or should we scrap these and start again?