I am tired of reading reviews of mysteries (or pseudo-mysteries) in which you're told that you're supposed to want to read the book because it's better than the whole rest of the genre - that it really has good characters, or that it's well written, or, like one recent example, that it's worth re-reading. As if it's incredibly unusual and surprising for a mystery to have these qualities.
I am hereby officially refusing to buy any book reviewed this way. And not just out of annoyance. I actually LIKE the genre. So why would I want to take the advice of a reviewer who apparently thinks that the genre is crap? Obviously we don't like the same thing, never mind the possibility that the reviewer actually has no idea what standards are applicable.
While I'm at it, let's include any book where the publicity makes a big point out of the fact that the author's previous books were not mysteries, implying that s/he is a REAL novelist.