I believe that the best answer for this question is "subjective." A reflective essay is any essay that is written about the writer's personal experiences. The meaning of "subjective" is something that is based on one's personal opinions, emotions, or tastes. Therefore, subjective is the best term to substitute for reflective essay. You can also use the process of elimination. Analytical and factual essays should not be based on subjective information, and objective is the opposite of subjective, and so they would not be good substitutes. Hope this helps.
