I'm looking at #1 trying to picture it without the shoes, and there is nothing there. Adding the shoes has turned it into a great photo. Well done...now where are my old flip-flops?
Photo 1 is the winner here!
I'm with Walter (abraxas) in finding 3 a bit bland.
But I do enjoy your play with narrow DOF in the first two and quite agree with flyingseale on how the sandy shoes (that bit of sand in there is the icing on the cake for me!) make that photo a really really interesting and good photo!