What to put in a personal chess database? I was thinking about creating a personalized chess database for my correspondence chess play. What sorts of contents are useful to put in it and is there any big difference in having your own database versus just using one from online. The main factor that contributed me to do this was to deepen my opening knowledge of certain openings. I am open to any other reasons why I should or shouldn't create one.
For correspondence I keep a database of my personal opening book that I extend whenever I encounter a new move.  I include notes on things like why I chose a particular line and both numeric and verbal position assessment.  I also include select text from books or other databases that discuss that position.