Many years ago, when I could fit my theater resume on a matchbook, a local director asked me to produce his next play. He had years of experience so I thought I'd learn a lot from him, and I was right. Alas, when the play opened, we received a review that shredded the show inch by bloody inch. when I calmed down enough to read it with an open mind, I realized that the critic pointed out several bad choices we had made--updating the play made the mindset of the characters anachronistic, for example--and supported his opinions with facts and quotes. I learned more about theater from that bad review than I'd learned in the past year from friends and family telling me how wonderful I was.
Jump ahead thirty years...
A few months ago, someone on a writing group list complained about receiving a bad review for one of her books, and several other members of the group commiserated. They suggested reasons for the reviewer's bad opinion ranging from stupidity to prejudice about the genre to anger about the results of the November election. I didn't read the book, and what's even more interesting, I didn't get the impression that any of the dozen or so people who responded did either.
Even though I didn't read the book, the review struck me as possibly accurate because it included specific examples and passages. It also reminded me of a comment Chris Offutt made at the Wesleyan Writers Conference when I attended it: A hand-holding group is not really a group. It's a club.
You can learn more from a bad review than you can from a good one--assuming the review is legit and you're willing to polish your craft, both of which I admit are iffy.
I get few reviews on Amazon so maybe this whole discussion is moot, but bad reviews aren't the end of the world. It that's all it takes to ruin your day, you need to get out more often. Let's look at the whole pie.
If you're a writer, you are selling your books. You're no different from a baker, tailor, carpenter, car mechanic or anyone else who provides goods or services for pay. If someone buys your product, they have the right to expect quality and also have the right to complain if they don't believe they got it. You should look at their complaint and learn why they're dissatisfied. Maybe their reasoning is weak or they misunderstood something, but you need to make sure. If they do have a reasonable case, you need to do better next time.
Restaurants come and go, and there are only three reasons for this: bad location, bad food or bad service. The first one is unalterable, but the others can be fixed. If many people say the fish is overcooked or they waited a long time for someone to take their order, the restaurant needs to do better. If they don't the word will get around and people will go elsewhere for that fish. It's the same with clothing, plumbers, tune-ups or books. Critics--the few who remain--are supped to help people spend their entertainment dollars wisely, so if they don't like a film, play, CD or book, they will say so. They should explain why (not), too.
This is where writers miss the gifts in a bad review. What they do well will never keep them from succeeding. When someone points out something they (read, "you") do poorly, they're doing you a favor. They're showing you what you need to fix.
Granted, Riva's comments about useless reviews are easy to support. No one-sentence review is worth the second it takes to read it. No review that lacks details or examples can tell anyone anything. The more details and examples, the more valuable that review might be.
Ignore the five-star reviews. That's easy for me, and you already know you're wonderful. But if you get a three-star review or lower, read it and see why the person gave you that score. If there's no reason or it doesn't match their details, ignore it. But if they offer details, maybe even quoting a passage or discussing a character, they're showing you how to improve your writing.
Don't worry about the idiots who give you one star because you write romance and they don't like romance. That just means you shouldn't offer more free downloads. Ditto if they don't like profanity and your characters curse a lot. That's their effing problem, not yours.
But if someone points out that your character's behavior is inconsistent or hard to explain, maybe you should think about it. If they say they can't follow your plot because the events don't seem to lead from one to another, consider that, too. If someone says that she's never heard anyone speak the way your character does (Clockwork Orange is an exception), you need to write better dialogue.
Put simply, a review is a beta reader. It comes too late to help this book, but if someone points out something you do poorly, you owe it to yourself, your craft and your future sales to do it better next time.
When I send an MS to a beta reader, I tell them "I don't care what you like. Tell me everything that bothers, confuses, or upsets you, no matter how minor, even down to the type font. If they say something positive, I skim over it because I don't need to fix it.
But the beta reader who told me that Run Straight Down had "too much description and teacher routine in the first chapter" saved me from a bad review saying the same thing. Explanations and back-story belong later, after the plot and conflict gain some momentum. The Night Has 1000 Eyes made one beta reader say, "I wonder if this scene would have more impact if you put it in the other character's point of view."
Those comments helped me make the books better. What could I have done with "Gee, this is really great and I love your writing"?
Yeah, good reviews make us feel good, but they don't spur us to improve. I think I know my main weakness and I'm still trying to make those less visible, but someone has to remind me about them, preferably beta readers instead of reviewers.
If you don't want to get better, why are you writing in the first place?