There are various synonyms that can be used instead of the typical closing phrase "with kindest personal regards". These include "sincerely", "yours truly", "best regards", "warm regards", "kind regards", "affectionately", "faithfully", and "cordially". Each of these phrases conveys a different degree of formality and closeness in the relationship between the writer and recipient. For example, "sincerely" is a more formal and business-like phrase, while "affectionately" is more intimate and personal. Ultimately, the choice of closing phrase should reflect the tone and nature of the communication being sent.