I like to try it all just to see what work and how i can improve
I like the 1st one and the last one best. The b&w doesn't do much for me.
The uneven brightness is bugging me. Id lasso the pixels with a magnetic lasso tool and feather them out at about 50 and do a curves layer to even them out. I really like the first version the best! Nice job! I think bare feet would have been cute too