Cockpit components are the most personal parts of your bike as they touch your body. These components are often also a great way of showing off your personal taste & style by using different colour combinations etc. The good thing is that these are usually not the most expensive components and over time you can try out and experiment with a different saddle, seatpost, stem or bars until you find what works for you. The choice between flat bars or drop bars, how wide they are, stem length, or raising or lowering the stem and bars will greatly effect your riding position and comfort on the bike. For example wider saddles are better for more upright riding positions and narrow saddles are more comfortable for racy riding positions. Don’t worry too much about getting these things perfect from the beginning, your ideal riding position and personal preferences often take years to develop and hone, and are constantly changing.