Being ESL, I admit that I’m not a grammar expert. That being said, most of the time I can tell if something is not grammatical and if it sounds wrong to me it usually bothers me. This is especially true in books. If I can tell there are mistakes left and right, that shows me the author failed to hire an editor, and that is just unforgivable. If *I* notice errors, everyone else should too. I get that when you’re the writer you’re probably too close to see errors – so that’s why a professional editor is so important. Don’t skimp out people!
Grammar is not really as big of a deal as people make it out to be. The real purpose behind grammar is simply to make sure that you are understood. In order to be understood every language has its own accepted conventions. This is what grammar really is. That being said however, I think that people do tend to unintentionally judge based upon grammar. I mean, if I am reading a book and there are grammar mistakes all over the place, I am immediately less interested in reading on. I have noticed that if the author did not take enough time to have someone else proof read their manuscript, I tend to find that the plot is also rushed and the characters underdeveloped. I find grammar even more difficult to abide by today than I did whenever I was in college and I think that is because of social media. It is acceptable to shorten words in texts and facebook posts, but these abbreviated versions are NOT acceptable in a professional use and that can get confusing as you often times do not even noticed when you do it. One example is the word “probably.” Whenever I am texting someone, I type “prolly” because that is how I say it and it is shorter. I find that in my email correspondence to teachers and various professional entities, I am using these types of “short hand” vernacular. YIKES!