Floridal is standard Death Metal, the scene is very big and very overated.
New York is standard Death Metal, the scene is not quite as big as Florida's but features better songwriting and musicianship.
Texas has a unique sound and produces the best Technical/Brutal Death Metal and has one of the worlds biggest underground scenes.
North Carolina has a very big underground scene like Texas but isn't as well known and doesn't have as distinct sound.
California has a very big and very good quality scene. A lot of the DM is Death Thrash or Thrash inspired Death.