When it comes to personal preferences and choices, the term "up to the individual" is often used. However, there are several synonyms that can be used in its place. One such phrase is "a matter of personal choice." This emphasizes that the decision is solely in the hands of the individual. Another phrase that can be used is "dependent on personal preference." This shows that the decision is based on what the individual likes or prefers. "Subjective decision" is another synonym that can be used, indicating that the choice is based on personal opinion or perception. Ultimately, whatever phrase is used, it emphasizes the importance of the individual in making their own decisions.