A lot of bloggers have been fretting recently about whether or not it is okay to post negative reviews. For some, they don't want to upset authors. For others, they are hoping to be authors one day and don't want to ruin potential relationships with people in the industry.
I review every book I read, whether I like it or not. The majority of my reviews are positive. The reason they are mostly positive is that I read books I feel like reading. If I don't think I would like a book, I won't read it. Plain and simple. If I get sent a book I know I won't like, I send it to someone who might like it more. And I post negative reviews. I don't beat around the bush if I really don't like a book, mostly because I want readers of my blog to know I am an honest person. I haven't had anyone confront me about negative reviews, and I hope that people respect me for being honest.
When it comes to authors, I usually become "friends" with them after reading their book. Obviously, after I read and like their book. Otherwise, why would I want to talk to them in the first place? So I am not really worried about hurting the feelings of authors.
I do want to be published one day, and I admit that I freaked out when I read all the blog posts about how bloggers will never be able to be published because they have ruined all chance of friendship or business relationships with authors, agents, editors, etc. in the book industry. I think this is false. For one, there are so many published authors that were once, and sometimes still are bloggers. Emma Michaels and Julie Kagawa are a couple that come immediately to mind. I read books similar to what I write, and I like that kind of book. So back to what I said earlier, chance is that if I did review a book from an author that would blurb my book or an agent or editor that would represent it, I probably reviewed it positively. Because I like the kind of books I read, review, and write. And that's that.
EDIT: In fact, I think that publishers and agents like to see negative reviews. That way, they can know what not to publish/represent in the future.
So, if you are one of those bloggers who think they should quit blogging or never post a negative review, I don't necessarily agree with you, but I'm not going to tell you that you have to post negative reviews. Some people don't just because they don't see a point in reviewing a book they didn't like. For me, I review every book I read. No exceptions.