The Japanese may actually be the first people to use what we refer to today as sliding closet doors. These doors essentially follow the commonly accepted definition of a door that moves sideways or in an up and down motion. They still serve the same purpose as they did then, to manage space, provide ease of use and highlight or disguise internal or external features of a structure.
Front door designs can vary as much as if not more than any other part of your house. If you do not relish the thought of choosing designs and matching styles there are professionals who do this kind of work. Hiring a designer can ultimately leave you more satisfied than making the wrong choices and having to replace mistakes. Many door manufacturers have experts that can aide customers in the decision making process as well as cad systems that can design the door in computer graphics for the customer to see before purchase. Although the technology involved can be daunting to you, the end product will be beautiful front door designs and a better looking home for your to be proud of.
You will also be the decision-maker of how many panels you want the door to have, how many glass lites (if any) you want the door to include, whether or not a transom or sidelite will be added in, what kind of glass you want in the lites, what sort of hardware you want for the hinges, and more. Every aspect can be discussed and decided upon before the door is made. Once everything is ready, you should be able to receive an estimate from the manufacturer so you know whether or not you have gone over your budget, or if things are just right.