Some nice work there! C&C per req:
1. I like the idea here, but I would prefer to see your shooting position raised up a little- the 'up the nose' pose is rarely flattering, though for some reason it always looks good through the viewfinder. As well, your keylight is a bit strong here. Think a two-light setup with a reduced power would have worked better. There's a lot of unused space image left, and I think a slight move to your left would have made the subjects much more visible. As-is, they're a bit small and hard to see see. I like the flare over the last person's shoulder!
2. Interesting and unusal composition, but I'm not sure that the individual members are distinct enough to be easly recongizable.
3. Nice, but I wonder if perhaps a light image left, to provide just a bit of illumination to her right eye area and hair wouldn't have helped? Say about 3 stops down with a set of barn doors?
Just my $00.02 worth - your mileage may vary.
~John