Halt.

Here you define these concepts for yourself. They have no public definition ('though governments and church authorities and the such try to define it for you...), and as such are completely subjective.

In your point of view, if you derive pleasure from raping and killing preteen virgins, this would be good. I doubt many would agree with you ('though I could see your point: In -your- reality it would be good).

Do the concepts of good and bad exists? Yes. Are they universal? No, they are different for every individual.