My earliest memory was very brief. I remember liking to crawl under beds to sleep. I remember crawling under my parents bed and hearing people running around and making significant noises. That's all I remember, but when I told parents about my earliest memory they filled in the part I was unaware of. Apparently I crawled under the bed and my parents couldn't find me so they thought that I had left the house and were about to call the police before they happened to look under the bed and found me. I had to have been about 3, but I'm not completely sure.
My personality is similar now because I still prefer to sleep in complete darkness, any light can prevent me from sleeping peacefully.