Today's deadly sin for writers is:Singularity
Sometimes known as stubbornness, inflexibility, or self-importanceThis writer is easy to spot. He has a Vision that he refuses to compromise (never mind that no one else is at all interested in reading about that vision). He has a Style that is all his own (and completely incomprehensible). His words are a pure and unmitigated expression of Himself (which is, unfortunately, painfully obvious). This writer never takes a class because he has nothing to learn. He refuses to hire an outside editor or coach for fear his words will be tampered with. He never bothers to read the query or submission instructions on agents’ or publishers’ web sites because those kinds of mundanities do not apply to him. He will never take a suggestion for revision because of the afore-mentioned Vision. And he will never be published.