Butch, a gifted musician, alternates between periods of dark despair and times of elation, great energy, recklessness, and creativity. he seems to be most prolific during periods of mania. butch is most likely to be suffering from

butch is most likely to be suffering from: Bipolar disorder
bipolar disorder is a form of mental disorder that causes the victim to constantly experience a drastic change of moods without any particular reason.
People who have bipolar disorder could experience happiness and drastically become really-really angry on the next minutes