I've always been partial to the Broadway Next to Normal poster. The sorrow filled eyes looming over a suburban neighborhood. But Next to Normal has lent itself to some great designs for various regional productions. The show has so many "iconic" and/or thought provoking images that could be centered around in a design.
I love the poster for The Last Ship. It is my favorite B'way poster right now. Also love the posters for "Nevermore". Especially the one of the guy wearing the cool glasses.
This has always been one of my favorites. The way the title makes a shadow and the way the powerline poles get smaller to suggest the unending desert is just wonderful.