I was just thinking something like this as well. The best term for it is 'schema' but that moniker seems so, ill-fitting. For lack of a better term the 'schema' isn't really designed, it's discovered.

Thats how I know I'm on the right path. I start to organize the data and new things that appear fit naturally into what I've already discovered.

This is the epitome of organic design because you are simply the conduit between the truth and a schema definition. If you force yourself to not be clever and just interpret what you've found, your database model will be solid.