I have been using near-perfect grammar ever since I taught myself in a two-week period of late 1996. Almost always would I make an effort to 100% on each English Literature, World History, Mythology, US History, European History and many other classes involving correct spelling and grammar. These are some of the reasons why I was allowed to teach a few literary classes back in highschool (approximately 2 1/2 years ago, Senior year) Plus, the fact that I have been known to be exceedingly well at emphasizing words, keeping most students interested in the subject.
However, despite the relentless writing and vocabulary, I will admit that I'm not satisfied... So I do believe that I need to learn much more to further my expertise.