The most obsessive denotes a strong sense of dedication or fixation on a particular object, idea, or task. The antonyms for this word would be people who are disinterested or apathetic towards something, instead of being preoccupied. Other antonyms may include those who are balanced, moderate, or easily distracted with a tendency to change focus quickly. The antithesis of the most obsessive can also represent someone who is indifferent, casual, or free-spirited. The opposite of this word can connote a person who aims to avoid obsessions and rather enjoy a laid-back, contented, and peaceful lifestyle without being too committed to any single thing.