I was away the past few days and only read a few pages of the Chinese teachers thread but noticed you asked why you call your teacher "sifu."
Funny thing is, all my American teachers requested to be called this and after about a week my present teacher (born, raised and trained in China -- though his good stuff was imported from China, having paid for the teachers to come over and host them) kindly asked me to stop calling him sifu -- it made him uncomfortable.
He said sifu is like a father tittle and should only be used if you are living with the teacher and the teacher kind of takes care of you while you train.
He prefers to be called Mr. Chan. I call him my master though, because he is the first person that I have met that the title truly fits. His skill is such that to me, anything less would be an insult .... but it's funny how he doesn't care either way.
Anyway, when someone's attacking you and their fist is coming in it goes beyond American, Chinese, ect., it goes down to the HUMANITY .... what works?
My master has now developed his own system, E-Chuan. It has a lot of Ba Gua and HSing-I in their but also Grandmaster Lui's pole footwork and his own ground fighter. I've never thought of it like this before but it is a true AMERICAN art developed by a Chinese man. It takes in everything good and dispells everything that is worthless. It is open to change, welcomes it and actually constantly searches to find its own weaknesses and beat them instead of hiding them under the blanket.
All that matters: Can you kick a$$?
With Barnes and Nobles, and the Internet book sellers, there's more than enough history to be obtained. I don't go all the way into Chinatown to study Lau Tzu, I go to learn how to beat good fighters..... though I do get history sometimes as a way of explianing something here and there and apreciate it .... it's just icing on the cake and some down time to rest between drills.