If one area of a house is ripe for expressing construction details, it is stairs. The combination of the various parts (steps, guardrails, handrails) and the willingness of clients to make these elements special creates many unique designs.
In this stair, the steps are simple blocks of wood, but the bolted connection of the post to the step (in center of photo) and the way the handrail floats above the steel support add complexity to the stair. The rounded corners of the steel are particularly nice, expressing the effort of actually bending the bars.