I've been interested in both the style and construction methods of building for as long as I can remember. The wide variety of styles through the ages have fascinated me as has their history and development. It is intriguing how the geology or natural history of an area are reflected in the construction materials one finds and how that too varies over time according to changes in skills and available technology.
Also of course, the history can be fascinating and to that extent individual strictures often have a story to tell.
So for me, stone or timber, ancient or modern, urban or rural, artistically flamboyant or utilitarian; all buildings have their special interest.