starting point 'knock on wood'

i thought the best way to get into this was to start get past this block ive been having and get into making work again, so i started with the idea of 'touching wood' meaning good luck.

Knocking on wood, and the spoken expression "knock on wood," are used to express a desire to avoid "tempting fate" after making some boast or speaking of one's own death. In the United Kingdom, Egypt, Ireland, India and Australia, the term "touch wood" is used.

The meaning of such expressions is that the spoken words or thinking are only hypothetical and are not really wished to happen, so everything may not really happen but fell in a stone or in a piece of wood.

i started off by taking images of my hands touching woodern serfaces on my DSLR. Tables mainly as they are normally varnished rather then painted wood ect. theyre not amazing photographs, i used it on macro so i can play with depth of field and such and just get a feel for it, and really just getting back into the swing of it. 

photos #1

Out of all of them the last is most interesting, more for the angle, the addition of more of the background, and the detailing on the table. the others are good but all a little two similar. The lighting and whitebalence has clearly changed within the locations and this is something i will have to be weary of next set of images that i complete. Also the colour and such of the tables change and look different. Maybe insted of the same hand i could use others? a mix of surfaces and people. However i really do like the depth of feild and playing with it to some extent. i also like the way the texture of the skin reflects the texture and grain of the wood. 
I also tried experimenting converting the images to black and white to see the effect it has on the images and how it would bring the images together. 

these images do seem to fit better together then the colour versions, but i dont know if thats just because you cant notice as much the difference between the images expesh with the whitebalance difference not being so obvious. 

another experiment i tried with these photos was to create a double or triple exposure by overlaying them on photoshop to give the impression of movement to see if that would work or how it would look

while  in some ways this works, it gives a ghost like effect and hints at movement which u dont get in the images before. but i dont know if its really relievent? 

what am i trying to say about this idea of knocking on wood? or touching wood and its relationship with modern day?