Stairs and Shadows

Stairs in the State Library of Victoria. It was the interplay of shadows that caught my eye for this shot.
I'm currently trying to select 4 shots for our local Photography Club exhibition to open at the beginning of November. It's not that easy when it comes to choosing 4 worthy shots ( the exhibition is supposed to be a display of our clubs work ranging from absolute beginners to professionals, but when it comes to the crunch why do we feel self doubt of our work?)..

Could YOU choose four shots from your gallery if put on the spot?...