In some cases there are ways of thinking about what an architectural program produces - interior and exterior - that is not necessarily directed by an economic requirement, but is a diagram based on human actions, selfish or otherwise.
The Besicovitch style is architectural. He builds out of simply elements a delicate and complicated architectural structure, usually with a hierarchical plan, and then, when the building is finished, the completed structure leads by simple arguments to an unexpected conclusion. Every Besicovitch proof is a work of art, as carefully constructed as a Bach fugue.
I was a very interested arts student, I was always into that part of school and when I got into high school I went into architectural drafting. It gave me an understanding of how to build things and it's really helped me put things in perspective. With my music and my movies, to me it's all art.
Please, don't use a cornice as a doorstop. At least put it somewhere where people will have to look up at it. Architectural details really ought to be displayed in the same relation to the viewer as they were originally intended.
It is usually a mistake to impose an individual's taste on a room that has its own....style. Conversely, to put very fine pieces of furniture in a room that is without architectural distinction is as absurd as wearing a tiara with a bathing suit.
I used to love to draw. I didn't want to go to art class because I felt that would be too corny when I was young, but architectural drafting was the cool thing to do because there was more precision. It taught me a lot about building and structures and doorways and frames and windowsills.