First thing I'm noticing is the inner borders being off. By off, I mean they are unevenly placed. You could reate one layer and ctrl + a to select the entire canvas, right click and stoke the amount of px you want in. Then make a new layer and select inside that and stroke with the white before setting the layer mode and delete the one you used as a guide.
Colours are pretty good, you could try duplicating the base layer blurring the top on and setting it to overlay and adjusting the opacity. That'll give you something else to try out. :sdo:
Agreed with the others. You should have cropped that last one closer to the guy in stock; even cutting off most of the legs would have been good. But if the stock is sorta LQ or the resolution is small I would advise against it.
Anyway, KIU!