Coming from the Queen of "working with what you have" here are my 2 cents:
They look like what they are, so that could be a good thing or a bad thing. But they look like an immature "photographer" playing around in her bedroom trying to take a "unique" photo for her myspace page. Just judging by the photos you have somethings you could work with here to make them not look like you are sitting in your bedroom hoping your parents/roommates dont walk in. Be creative and think outside the box.
I dont think the poses are very flattering and in #2 it looks like you are flicking off the camera. Is that intentional?
Lastly the lighting is very harsh and you lose a lot of the facial features because of it. I dont know what you are using, perhaps just some sort of desk lamp but there are cheap, cheap cheap and creative ways to light. Want some tips on this, PM me.
Lastly, when you have NOTHING at all to use for lighting, props, etc, you force yourself to get creative and sometimes the results are beautiful.