I think that just before Jesus performed a miracle he often had a slight smile on his face…a hidden smile of anticipation. After all, He was about to do something good for someone He loved. He was about to give the joy of life or sight or health to an undeserving individual whose life would never again be the same.
He was a little like the small boy in the classroom whose teacher was about to unwrap the Christmas present he had given her. He believes it is the best present she would receive. He knows she will love it. As she starts to unwrap it he squirms in anticipation at his seat. He can hardly wait to do something nice for someone he loves.
Jesus was eager to provide healing for all those who came to Him. I think he really enjoyed it each time He restored health to them. We will never know how much energy each act of healing cost Jesus (Mark 5:30) but I will always believe He liked doing them.