#1 great pic. I like the angles of his arm and the overall composition.
Seems a tad bit too saturated or something, I dunno. He looks a bit plastiky, but that can just be me.
#2 Would like to see the two a bit closer together. To give a less distant feeling and a more teasing feeling. Maybe have him move a bit to his left so their arms are closer.
I like the sharpness and the look in her eyes, he needs to work a bit on his modeling

I agree with the choice of shirt on background, you somewhat lose him.
#3 I like the idea of the shot and the saturation choice. I would of liked her hand more in the middle of her lips, symetry is important. Her hair is also lost with the black in the background, so be a bit mindful of that nex time around
Nice composition, nice forground element
#4 Nothing really technically wrong, its a nice picture (compo, contrast,...) I'm not digging the idea...seems like she is hugging a water fountain?
Overall though, awesome job! I remember your first few pics you posted when you joined, you are definatly on the right path
