Yes, that is quite long. I've always built on miniature scale; I'm not quite sure why. Lego people, for example, were far too big, so I economized and used only their heads for people so that buildings could be 13 stories rather than two. And I never built with a scenario in mind; I think it's a lot more exciting and romantic for things to exist with no known purpose. I read this book by Ian M. Banks about a guy that lived on a gigantic bridge, so large that no one knew what it connected. I can't isolate the specific element, but there's something in it that strikes a deep chord in me. Anyway...
What's your childhood garden?