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#1 - nice, but I wish her head/nose were on the camera side.
#3 - her knees. I mentioned this before somewhere else, but I prefer that women's knees be slightly bent, so it doesn't look like her knees and locked and creates a "gathering" of skin right on top of her knees.
I like #4, too. Maybe her leg could also be peeking out from the right and his hand can be on her thigh... slightly pulling up her skirt.