Valyrian blood

[Boaz]

So Raven brought up the interesting subject that Jon's hair and eyes might indicate that he had Valyrian blood.

However, in terms of the story, the Starks, and Daenerys, what might this imply?

This has occupied my thoughts today. I did not see this long buried thread earlier. I started a new thread with some observations and guesses at blood... Skinchangers, dragon riders, and blood.

One question about Valyrian blood. Do all Valyrians have connections with Dragons?