Walter Montego:I apologize for the extra 's' that I had typed.  Looked it up now and there was no 's.'  It was 'make no mistake, .... .'

Well, about the books and professors, I use Oxford Advanced Learner's Dictionary as the main source.  What it says, I consider to be the reality and truth.  I use Websters Advanced Learner's Dictionary too, but not as frequently. 

As for my professors, I listen to what they say but never try to learn it before I check it with a more 'reliable' source such as a Native Speaker.  After all my profesors are Farsi speakers just like I. 

I am good at grammar, yes.  I use Practical English Usage, and English Grammar in Use as my main sources.  Oxford Dictionary of English Grammar and Oxford Guide to English Usage are very good and informative books that I use very often too.

And, as for whether or not I have an accent, I have always wanted to know whether a native speaker can easily understand I'm not a native or not, but I've never had the chance of speaking with a native.  maybe if one native speaker here would volunteer and listen to my recorded voice, I could understand that and let you know too! 

I especially appreciate an American and a British native speaker if possible.  

By the way, by 'And then there's your English as compared to my English.' did you mean that his English is different from yours?