I do not know why I care," Drizzt answered honestly. His eyes turned back to his ancient homeland, where loyalty was merely a device to gain an advantage over a common foe. "Perhaps I care because I strive to be different from my people," he said, as much to himself as to Bruenor. "Perhaps I care because I am different from my people. I may be more akin to race of the surface...that is my hope at least. I care because I have to care about something.
R.A. Salvatore (2009). “The Crystal Shard: The Legend of Drizzt”, p.44, Wizards of the Coast