I have excellent long term memory. I remember what I was thinking and doing as far back as when I was 18 months old. I remember figuring out that I didn't have to think about breathing for it to happen, learning the word for carrot and counting to 100 and the thoughts that accompanied these and other small milestones. Even as a child I realized that this was considered odd, at least by my parents.
Is this common to INTjs?
I have synaesthesia http://en.wikipedia.org/wiki/Synesthesia and it is said that this condition enables the brain to code information differently resulting in a better memory. The different sensations act as a mnemonic device, I guess. But my mother(INFj) and sister(INFp) both have synaesthesia and both have terrible memories.
I havn't met anyone that could remember their past like I can, but I also don't know any other INTjs in real life, so I didn't know if this is a common INTj trait.