[antiquark]

I think to remember something, you have to replay it in your mind from time to time. The more you do that, the more you remember. (Reminiscing is probably the right word).

I guess differentiator between the "style" of memories is your personality and what you dwell on.

[snicky]

It's also scientifically proven that every time you recall a memory you change it. In other words - your further experience can affect the memory of past events.