So, I think the Dragon Born are pretty boring as far as racial abilities go, until you start getting racial enhancements. Then they get a little better..

The first is the resistance 20-30ish resistance is hardly anything when people are easily able to do a few hundred points of damage with that.

So

At level 8 or 10 You get a feat that gives you absorption equal to your level.

At 16 or such, you get immunity to the element.

At level 1, you also gain a resistance against Sleep and Paralysis attacks and bonus or immunity to fear caused by the frightful presence of dragons