These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The TV Show:
Awesome Music: Mark Snow provides a beautiful opening score and the Soundtrack boasts the likes of Nine Inch Nails and Portishead.
Broken Base: Many fans were understandably upset that the Fully Absorbed Finale featured Frank having a very small role while Mulder and Scully solved all his problems for him. Others say that seeing him get a happy ending is such a relief that they could overlook it.
Jumped the Shark: Debate continues over whether the series Jumped the Shark after the first season, after the second, or never jumped it at all.
Exactly, how did the Guardians determine who got to be a Chosen One? There seemed to be no distinguishing quality; one of them in fact turned out to be a racist bigot and was rejected. Another (Terra of the Teen Titans) was already dead, too. You'd think the Guardians would have known that.
What an Idiot: Harbinger, a character left over from Crisis on Infinite Earths, records the history of the universe in a device... which she leaves adrift in space for anyone to find! It was thanks to this that the Manhunters found out the secret identities of all the heroes.
Made worse by the fact that she barely gets reprimanded for it, and in fact joins the New Guardians.