My primary reason for writing is to keep my memories tidy and cohesive. The longer a memory goes unused, the more it fades and writing about it preserves the details while I still have them. Quite often when reviewing a memory note months or years later, additional details surface and I add them to the note.

Not only does that help me remember but it provides documentation of my family life that can be passed on to my extended family since our stories interrelate and many of them treat writing as an alien process.

Oh... writing is also fun when I can write what I want.