Speaking of Greek pronunciation, when I go to mathematics meetings I can always tell what part of the country the speakers are from by how they pronounce the Greek letters that commonly occur in various formulas and equations. Letters like "phi" and "psi," for instance. People from the east coast say "fee" and "see," while westerners says "fie" and "sigh."
I speculate that the reason is that easterners (those dilettantes!) try to pronounce Greek the way they think the Greeks do (sort of like ordering in French in a French restaurant). But westerners (think John Wayne) say, forget those sissy Greeks, I'm going to pronounce it the AMERICAN way!