[andy58-in-nh]

That's a very good sampling of Massachusetts place names whose pronunciation immediately informs you if you are addressing a local or an import. There are others as well: Chatham = "Chat'm"; Nahant = "Nuh-hahnt"; Scituate = "Sit-u-it", Barnstable = "Bahn-st'bull, and Lawrence= "El Barrio del Norte". Just kidding. Sorta.

[One_Upmanship]

The link I made above has a clickable map. It appears to be quite thorough.

This is another good one:

Prep

The American "posh" or "snob" accent. Also refered to as Boston Brahmin, after the East Coast Establishment families which are known as such. It is associated with Manhattan stockbrokers, Reagan-era yuppies, and the entire state of Connecticut. Think American Psycho. Clench the jaw and talk about stock prices. The yacht-club villains from a Rodney Dangerfield or a mid-1980s John Cusack movie will probably speak in this accent.

• Stereotype: Politely amoral greed. Emphasis on the greed, and sometimes less emphasis on the polite.
• Examples:
  • Christopher Buckley.
  • Major Charles Emerson Winchester III from MASH.
  • George Feeney from Boy Meets World.
  • Thurston Howell II from Gilligans Island.

This is the accent of people raised in New England who are of Portuguese stock. Also known as "Portugee", this is a subset of "Down East" (see below) that almost never shows up in movies/TV because the producers are afraid that nobody will understand why the blond, blue-eyed guy sounds like a Bostonian (see below) raised in France.

• Stereotype: Hard-working, honest, salt-of-the-Earth fisherman. Please note that "Portugee" is a slur and a great way to get a churrico-scented fist in your face if you are foolish enough to use this word around Portuguese people.

Down East

Spoken in upper New England, characterized by broad vowels and terse sentences. Tends to say "ayuh" a lot for "yes."

• Stereotype: taciturn, parsimonious, dry, rural, witty.
• Examples:
  • Fred Gwynne as Jud Crandall in Pet Sematary.
  • Most of Stephen King's books; not only does he write Down-Easters very convincingly, he has a Down East accent himself.
  • Bert and I.
  • President Calvin Coolidge epitomized the speech and the attitude, as did Margaret Hamilton.
  • Watch the early scenes in the classic movie Nothing Sacred with this in mind.

Boston

An urban version of Down East. "Pahk the caah at Haahvad Yaahd."  ^*

^{Please note that if you do try this, you will be summarily "towed to Meffud or Summaville"}

"I am going to Korear to furthah my careah." The Boston accent itself has two extreme versions:

• "Kennedese," so Flanderized that it sounds more Australian than American (at least, what Americans think Australians sound like; it's actually Bostonian with a generous dose of British).
  • Stereotype: Sophisticated, a leader, rough rich character, Old Money (as Old as money gets in the US, anyway), aristocratic in a non-British-affected way, probably a bit stuck-up, parodying a Kennedy.
  • Examples:
    • Mayor Quimby on The Simpsons
    • Any member of the Kennedy family, but especially JFK.
• "Southie," mostly associated with gangsters, which can be spotted by a character saying "aboot" or "aboat" for the word "about."
  • Stereotype: Working-class Irish Catholic roots and a Violent Glaswegian disposition.
  • Examples:
    • Rogue slayer Faith Lehane (Eliza Dushku is from Boston herself, but speaks with a more middle-class accent).
    • The Departed is a gold mine of these.

A peculiar, seldom-heard subset is the Rhode Island accent, which combines New York percussiveness and Boston consonants with flat Chicago vowels, and sounds vaguely Brooklynese to people from outside the area.

• Examples:
  • The most famous example is probably Emeril Lagasse, who is not from Rhode Island but Fall River, across the border in Massachusetts, where the accent spills over to New Bedford or thereabouts and combines with the Luso accent. (Emeril enunciates his vowels a bit more than the typical Rhode Islander though.)
  • Peter Griffin from Family Guy has this accent.