What is the Biblical basis for the idea that the 'quality of life' in hell is not the same for everyone? What is the Biblical basis for believing that an existence in hell will be appreciably different in quality for each individual - i.e quality or grades of hell? Do proponents of this idea get support from Jesus meting out a lesser punishment for the ignorant slave?
is there a reason to believe that An existence in hell will be appreciably different in quality for each individual? 


  Revelation 20:12  And I saw the dead, small and great, stand before
  God; and the books were opened: and another book was opened, which is
  the book of life: and the dead were judged out of those things which
  were written in the books, according to their works.


Each is judged according to their works.

There is also a parable about proportionality;


  Luke 12:47-48  And that servant, which knew his lord's will, and
  prepared not himself, neither did according to his will, shall be
  beaten with many stripes.  But he that knew not, and did commit things
  worthy of stripes, shall be beaten with few stripes. For unto
  whomsoever much is given, of him shall be much required: and to whom
  men have committed much, of him they will ask the more.


God is just and his punishment is just.

God is also merciful.


  John 5:24  Verily, verily, I say unto you, He that heareth my word,
  and believeth on him that sent me, hath everlasting life, and shall
  not come into condemnation; but is passed from death unto life.