Description or Notes property on objects.

Sometimes you open a file from 3 years ago or a file made by another person and you can't even begin to remember or guess the purpose of some objects. It would benefit me greatly if I could type a paragraph or two into the object itself.

I know the mesh data can have custom properties but I might want to reuse the mesh data in multiple objects and have different descriptions for each. Also text can only be added to the tooltip box and it's not suitable for composing multiple paragraphs.