I was made to think this evening (after an interesting radio program) about memoirs and autobiographies. Memoirs are an entirely different literary genre from auto/biographies. Biography focuses on a chronological series of events in a life, whereas a memoir speaks more to the development of one's personality, character, worldview, or life as seen through that person's eyes.
If your memoir is like mine, it is vastly different from your biography. There are a lot of things that have happened in my life that would necessarily need to be included in my biography. Those events would not, however, need to end up in my memoir. If I'm writing a memoir, I can focus on what was most important to me, and what I feel helped to shape me the most. I can interpret events, and I can take great liberty in doing so. With biography, you only get the facts. You don't necessarily get to see the personal effect.
I have made much more out of my life than just what has happened to me. I'd definitely rather write a memoir.
Pax et bonum