What is good service?

What is good service?
What is bad service?
Is good and bad service just a matter of opinion,
or is there something objectively measurable about good and bad service?
Does good service matter?
Should I expect good service?
Or should I just be grateful and surprised when I get it?
Should companies that provide bad service be allowed to operate?
How much chance should they be given to improve?
As much as the market will take, or should their be more control than that?