A dragon is, well, a dragon, right?
Now it doesn't have to be. It's easy enough to come up with the stats - age, colour, size, weapons, etc. - but how do you tell one dragon from another?
Here are some 30 descriptions that go well beyond game mechanics. You can use them as is, the juvenile gold Cloghgyrtu the Coward quite appeals, for example, or you can mix and match if you decide that his velociraptor head with double brow horns and stiff neck that he has trouble bending looks better on a different dragon.
They're all like that, those little features that enhance descriptions far beyond just saying "It's a large red dragon" and embue each one with character. One might have silver eyes, another a whip-light tail, a third tends to cough a lot.... scales might have a range of colours - and not even the official colour that the dragon in question is from a rules mechanical standpoint! That could prove entertaining as the gold-scaled beast advancing on you suddenly spits acid or electricity...
A neat idea to help personalise your dragons and make them come alive to your players.