Long Island consists of Nassau and Suffolk Counties, though the New York City counties of Queens and Brooklyn are also on the Island. Nassau County is the wealthiest county in New York State(not including New York County/Manhattan). It is also the 5th wealthiest county in the country. Suffolk County is known for the exclusive Hamptons beach enclaves, where many actors, actresses, NYC businessmen, etc. have summer estates. Long Island is home to the most expensive house in the United States. Long Island is part of the New York City metropolitan area(which also includes Westchester County in NY, a few northern New Jersey Counties, and Western Connecticut).
Long Island is known for its outstanding schools, many of which are nationally recognized. Long Island is known for its high quality of living, as well as being one of the most expensive places to live in the US. Fire Island National Seashore is also part of LI. Long Island is surrounded by beaches, and residents can enjoy Jones Beach, Long Beach, Point Lookout, Lido Beach, beaches in the Hamptons, Orient Point, etc. Long Island also has the lowest crime rate in the country.
North Shore communities are known for affluence, South Shore communities are known for beaches.
Long Islanders also generally have a distinct accent, usually associated with the New York City metro area.
Oh you're from Long Island? You must be rich!
Oh you're from Long Island? Please say "Long Guy Land"!
Long Island? isn't that where Billy Joel is from?