Best sub-part of the game?

Which did you like best and why?
The quest for the first Stone, with Luby?
The quest for the second Stone with the center of the world and the Hyperbole court?
Or the quest of the last Stone?
The quest for the first Stone, with Luby?
The quest for the second Stone with the center of the world and the Hyperbole court?
Or the quest of the last Stone?