I actually like to read negative reviews more than the positive sometimes. Not only for a little humor sometimes, but because they often contain info that I would like to know. A thorough critique should contain both the positive and negative opinions. The positive reviews are just as exclusive in often only praising a work but not giving any full criticism.
If you buy a TV, you will want to know all the nice features it has, but you will also want to know which problems people have had and what they don't like about it.
The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents. ... The piecing together of dissociated knowledge will open up such terrifying vistas of reality, and of our frightful position therein, that we shall either go mad from the revelation or flee from the light into the peace and safety of a new dark age.
~ Howard Phillips Lovecraft