@thefishcrow It's all going to depend on the dragon, BUT here's some tips!
1) Dragons like being respected like any other person. Get to know them and respect their boundaries.
2) Don't touch their hoard without asking. Ever. If a dragon lets you view the deep parts of their hoard, that's a massive gesture of trust and a good sign they like you.
3) Any further details depends on the color and temperament of the dragon, as well as individual interests. But remember: Dragons in D&D ARE color coded for your convenience!
(Ravinia Song is silver dragon, she can tell you more)
@Jssra @Ulfra_Wolfe This dragon is purple
@Ulfra_Wolfe @thefishcrow IME Pernese colors will get you farther than D&D ones, but both have serious limitations given the enormous variety among dragons. :)