Well, that's the tricky part, isn't it? Being grammatically correct, and still entertaining. When I see reviews or even posts with dumb spelling errors ("The Shinning", and they're not referring to The Simpsons' parody), it makes the writer seem less intelligent to me, and I start to tune out.
Of course, you're absolutely correct in saying that if someone is technically perfect, they're usually dry as dust.
Finding that balance is tough, but that's why I say it's good to get the education in anyway. Learn the rules, but know when to break them for comedic or dramatic effect. Really, that applies to any artistic endeavor.
CINEMA PAFF - Your BB-Movie Showcase *
* - The extra B is for BYOBB