[@dragonmancer]
With what the other two said, he's just a bit OP. Not that I have a problem with that for combat reasons, but it would make things dull fast. 

For my recommendations, we do have a mage in the party. If you went with low knowledge in magic, you could maybe learn a few spells from my character, or you could do the opposite and be rather scrawny initially and have a good magical aptitude, and learn from the Orc or the Ogre how to be strong physically.

Or nerf both and keep your dragon powers. Just limit to only one at a time.

Being fireproof is another thing I noticed. That doesn't seem that bad to me, but in some situations it could be just plain op. I'd make it so he takes heavily resisted fire damage, but not enough to completely immune himself to it. You can say you're immune to fire, but if someone comes up and literally drops the sun on you, it's no question that you're going to get destroyed.

For little things, here we go.
- Lower his strength greatly. Keeping it high is fine, but he will need to struggle to keep it if it's like 2 tons.
- Dragon summon needs removal or great nerf.
- He can be a bit slower. 
- Pain tolerance is fine, but don't have him be like "oh i'm good" after his leg was just removed completely.

Those are my notes.