(Also see "How do I know if I'm a dragon?" above.)

The question of sincerity often boils down to earnestness -- people pretending to be dragons haven''t got as big of an investment in their identity as the true dragons do. Staying power is the biggest indicator.

Of course, it''s a lot easier to tell which dragons are "fakes" after one knows what "real" dragons are like. Hanging around the dragon community for a few months and getting to know many dragons will be invaluable in helping you to form your own guidelines for dragon evaluation.

For some idea of the sort of things that you can notice with sufficient exposure to draconity, you can see my list at http://www.draconity.com/faq/true-dragons.txt.