I think you should change 'em up a bit to make 'em more unique. I mean, two of the characters are in suits but their pants are just as baggy as the other ones. You should make each article of clothing for each character unique. I mean, they even have the same wrinkles! That seems lazy to me.
Are their shoes normally the exact same color as their pants? Or aren't they wearing shoes? Looks like their pants are their shoes...like pajamas or something.