Were Dragons inherently "evil"?

[Galadriel55]

Originally Posted by Andsigil

Smaug's age and apparent wisdom seems to be proof that he knows he's evil and likes it.

I think that his discussion on ethics with Bilbo shows that he at least has some theoretical understanding of good to debate, sympathize (if not empathize), and manipulate Bilbo. Who knows if somewhere out there lives a dragon not utterly steeped in evil?