I would absolutely love to be able to fight dragons more in this game. Either solo or in a group, otherwise this would be impossible for solo play. In each area you level up in leading up to level 20, 25, 30, 35 and lastly level 40 you could fight a white, a black, a green, a blue and a red dragon respectively. (or disrespectfully! Each to his/her own.)
The boss' can drop gold or items that could be used by a newly minted lvl 20 toon and so forth to lvl 40.