I like natural light portraits! You have achieved really beautiful contrast between warm skin and cool cyanish sky! Really like the colours! I think this portrait would have worked even with less revealing clothin. Also, not the biggest fan of the composition of the model in the dead centre. Maybe if there was a bit more space and air around the model in the framing it would work 100% for me too. Still overall nice image and keep on shooting!
Also not big fan of centered portrait, but sometimes works very well... This X structure making pretty good lines to the corners and symmetric :)
You are right about the X, I can see it now! :D