Write-heavy, read-heavy, update-heavy, or all? Consistent world-view or quick answers? Gigabytes per day or terabytes per day? Is the Time axis important? Do

Write-heavy, read-heavy, update-heavy, or all? Consistent world-view or quick answers? Gigabytes per day or terabytes per day? Is the Time axis important? Do you need to go back in time and query the state of the world? Do you need queries that relate the state of the world in two different points of time? Hmm, I should probably be charging you for this! :-) I'm distilling years down the rabbit hole into these paragraphs + saving you months of discovery.