Originally Posted by
BruceGee
The way they are depicted in fiction (Tolkien mostly, but going back to Beowulf) is that dragons seem to be perfectly happy to lie around on their hoard in an out-of-the-way spot for centuries until someone shows up to bother them, whereupon they make a ruckus. Even the highly intelligent ones mostly seem to want
a) treasure
b) to be left alone
c) vengeance on anyone who fails b
This describes two of the three dragons we've seen in OotS so far (the one at the top of the Draketooth family tree, admittedly, seems to have had...other motivations).
I suppose there is a more recent literary tradition of dragons banding together, making alliances, playing politics, and that sort of thing, but it's hardly true in "all of fiction."