About a year ago I started doing urban exploration photography in Detroit - abandoned schools, factories, warehouses, churches, etc. In additon I've been documenting the old grand churches of Detroit. The challenge of thiose is to get the detail in the stained glass.
The range of light in a scene can be incredibly wide, 10 stops in some cases.
In order to pull the details out of a scene I started with 3 shots, found that wasn't nearly enough. Now I start with 7 then work beyond that as needed.
I try very hard to keep the photos on the realistic side of HDR, though I have done a few 'artistic' ones
Some examples : https://www.flickr.com/search/?q=Apmadoc+hdr