These are very nice!! CC
1. Needs some warmth, maybe a touch of yellow. Also needs a new crop, get the eyes into the rule of thirds and you'll be good.
2. again needs a new crop and has color casts.. particularly red. I'd use the sponge tool and desaturate some of the red on his arm and face.
3. Is very yellow. It works with the warmness of the photo very nicely, everywhere except her skin on her face. Its a little much.
The great thing about these pictures is that you capture something in all of their eyes that provokes emotion... hard to do. Nice job