Many people talk in the famous Boston accent. I'm only really qualified to talk on a few intricacies of this dialect, but Adam Gaffin has compiled the excellent Wicked Good Guide to Boston English at Boston-Online.com.
Just one more thing. Never refer to Boston as Bean Town. Just as no San Franciscan refers to their city as 'Frisco', we prefer not to refer to Boston with a nickname featuring brown ovular objects. Feel free to do as us locals do and call Boston 'The Hub of the Universe' or just simply 'The Hub'.
I've covered this subject on my introduction to Boston. To see things in greater detail go to the website below.