The first two - he facial FEATURES are really nice, but in these, the face shapes are all wonked up in a few of them. You may want to work on that. Overall, I really like the originality of the design and the eyes are super pretty!
The second - The guy on the left looks BEAUTIFUL! Facial shape, expression, and especially the folds in his pants = LOVVEE!!
Girl in the middle looks really quirky, which is cool ^_^ again though, face shape is a little bit off (it looks crooked in comparisson to her facial features).
Guy on the right: WOAAHHH his shoulders are HUGE! May need to work on his anatomy more than the others. His chest is gynormous, which if you're making him a muscle man should be a good thing, but it's disproportionate to the rest of his body. His overall design looks promising though!