Some people still have misconceptions about steel Buildings considering them not so aesthetically pleasing. However, there are various ways to dress up the exterior of a steel building beside variety of finishes you can choose from.
You can customize and walls of your metal building using different materials, depending on the final aspect you want to achieve. This customization will not prevent you from adding more windows and doors and you can still make your building climate controlled, should that be your goal. As for insulation, you can add it before you finish customizing the end walls.
To dress up the exterior off their still building, many people use exterior panels ( mostly the case of agricultural and industrial buildings) as well as many other materials, used alone or in combination: stucco, brick, wood, stone panels, faux rock, concrete block etc. Some people also opt for incorporating wainscoting which adds a contrasting texture and color do exterior walls; it can be made from Stone brick or steal panels.
The use of residential or commercial windows and doors is another way to increase the curb appeal of a steel building. Additionally, you can have metal awnings to create shade.