Mozart Link,
So you might say that there is no scientific version of good and bad
Correct. The scientific equivalent are the positive and negative functions. They are neither good nor bad, they are necessary.
Good and bad (behavior) are human moral concepts of individual (communal) behavior and vary from community to community.
Good and bad feelings (emotions) have nothing to do with morality, they are purely subjective to the individual experiencing them. This is why a person, who apparently has everything a person needs to live a fulfilling life, may feel depressed to the point of suicide, and a Stephen Hawking may lead a rich, fulfilling life in spite of his physical condition.