That being said - you both pointed out the chopped off hand and the crooked horizon. I had her walking on the beach to get a more natural pose and obviously didn't get the frame right. As for the crooked horizon - is that something I can (should) fix in PP or do I just have to shoot it right to begin with?
It would be best to shoot the horizon correctly to begin with, use the grids on your viewfinder! Because there's only so much you can tilt in post before the subject starts tilting as well.