even earlier when dragons were little, as I remember one of danny's maids complaining about Rhaegal biting her, while Viserion was refered both as more trusting (as with Brown Benn Plumm) and lazy. It was even easier for them to chain him, as compared to Rhaegal. It is also mentioned about Viserion wanting to keep lap-sitting and shoulder-climbing even when he got a little big for it.
As I remember in the early reports of readings of Dayeneris I chapter from ADWD (Before the publication of the book) the peasant whose daughter was killed by a dragon said "it was the green one" (that is Rhaegal) while in the final published version he says "it was the black one" (Drogon). I think initially GRRM used the Rhaegal as the first one to kill a human to show his character traits, but later he decided to have Drogon do that - not because he is "more evil" but as the biggest/ dominant dragon frorm the 3 he would probably be the first one to upgrade his dinner menu + showing Rhaegal kill someone in the begonning of ADWD would diminish the effect of him killing someone at the end - It would bee too obvious as to which Dragon poses greater risk to Quenteen and Rhaaegal attacking him would be less unexpected.
Edited by aryagonnakill, 29 January 2013 - 07:30 AM.