I have to agree with fokker - I love it, but the bokeh is 'choppy' (for lack of a better word). Maybe add just a little Gaussian blur to the background? (just a little)
That's supposed to be the given bokeh of the 50mm f1.8? I'm not sure I can believe that. It looks "worked on" in pp, to an extent where it is creepy, actually destroying what in itself seems to be a nice photo (with a somewhat too little light on the horse), as the lady's expression is really nice.
kinda looks like someone went crazy with the smudge tool then CRANKED up the detail in the photo. the horse mane would support this. nice photo but the bokeh has killed it for me.