I think that it would be cool if the dragon appeared more and if you gave him money he would eventually become more frienly or even beggin to ask more money before you kill him. It would be fun too if you say no to the dragonblade then the dragon would come and tell you that he(by some random way) got the knowledge that you didn't want to kill him and more interactions would be avaiable with him. these are my ideas after a 2 hours playtime