"Beauty is in the eye of the beholder."
Learning to speak in terms of "I" ( "I think there are some beautiful cases in this article" as opposed to "There are some beautiful cases in this article", or "I think these cases are all different shades of ugly" as opposed to "All different shades of ugly") does 2 things:
1) it helps you to remember that your opinion is your opinion and other people may have different ones that are valuable too, and
2) you don't sound like some jerk to others trying to tell them what they should and shouldn't like.
Also, if you have a specific reason for calling an item junk, then spell it out - otherwise you just sound like an ignorant douche. Flatulence has given rise to the fart joke, which goes a long way to redeem the often strong odor associated with it, but there is no redemption for your stinky opinion, which no one cares about.