Glass is one of the most popular materials used today because of its availability, versatility, ease of use and cost. Simply panes of glass are often used as the sole material in some designs because it can be used safely and provides many of the aesthetic features that lend well to design.
Another design is the use of stainless steel to make the cabinets looks sleek and more elegant. Stainless steel requires low maintenance and is cheaper compared with other designs. It is also anti-corrosion and anti-stain. The stainless steel is available in many colors to fit the color of the room.
Most of the time when you seek out a door, you will see many of the same things. Not necessarily that all doors are the same, but rather you will see many of the same styles. While doors even within styles are technically different, they still retain the overall feel of the style. If you want a truly unique door, you may have to think outside of styles and even outside of the box.