To answer this question at all, I'd really have to know "What's supposed to be wrong with them? Has anyone said there's something wrong? If, so who were they and what did they say?"

Notwithstanding this, I would agreed with Robert that the eyes in the top picture look unnatural (but maybe they're meant to). If the girl is meant to look like a zombie, then probably more work in Photoshop is needed. The guy is the lower picture has very dark nails, which could be due to nail varnish or the use of ortho film (or a blue filter on pan film). Once again, if a weird effect is what you're after, you possibly need to add more weirdness! The overriding criterion is - do the pictures please you? Do they say what you wanted them to say?

Please supply more details!

Regards,

David