Than we agree...
What I said earlier was that these photos lack a certain appeal due to the photographic method in which they were created. Through photography, a photographer is usually trying to convey something - whether it be a story, a message, beauty, etc. I think that (this is only my opinion) this is what is "wrong" with these images. For the most part, they do not provide the viewer with anything. They are cropped so close that there is little story or context. While this could work if the emotions were right, it didn't.
For instance, image 5 (could you number them please?) Has the person completely off-guard, cropped in closely in a manner that is unflattering to that person. You can even see crumbs on their face! So it's not that you must post images only of "hot" people, but you have to be considerate as a photographer. You could take a well exposed image of a beautiful model, but if it is while they are blinking and talking, or chewing, or something of the sorts, it will not be a correct representation of the person.
Basically, I think that these shots - while techinically correct - are unflattering, and do not offer the viewer any interest. This highlights any "flaws", as that is all there is to see.