See You On The Battlefield
Hands down Master Chief, the story is completely based around him.John is the hero that everyone assosciates with Halo.When you think of Halo you think of Master Chief not Johnson Standing there with a Cigar in his mouth.Master Chief fought through and survived everything that was thrown at him, he is one of the few spartans left if the only one.
In conclusion Master Chief FTW!!!!
[Edited on 09.05.2010 12:35 PM PDT]