I have very clear, though disjointed, memories of some events when I was very young. I'm fairly certain I remember being born, but nothing in the memory is very clear, so it's hard to tell for sure. The next memory I have was when I was between 2 and 3, and I have clear memories of a couple dozen events between then and my 5th birthday. After that I'm able to place all of my memories in chronological order, and it's all pretty clear to me. I still replay conversations from when I was 8 in my head, even if they're not terribly important conversations and I'm the only one who would remember them.
I also have very poor short-term memory, it's like names and faces are erased from my cerebral hard drive before I'm even aware that they were there to begin with. I frequently just forget what I was going to say in the middle of a sentence, and there's nothing anyone can do to remind me what it was. It gets very frustrating sometimes, but if it's the price I have to pay to have the beautiful thoughts I have, I'm more than willing to pay it.