There's no definitive answer when it comes to choosing a font for a memoir. Different fonts can convey different moods and personalities, so it ultimately depends on the tone and style of your book. That said, some fonts are more commonly used in memoirs than others. For example, serif fonts like Times New Roman are classic and traditional, while sans serif fonts like Arial are modern and sleek. Ultimately, the best font for your memoir is the one that best conveys the story you're trying to tell.