The one aspect of mechanical keyboards that confuses people most is the different types of key switches and how to decide which one is best for them. Most of the time, selecting a particular switch comes down to personal preference. While the Cherry MX Blue switches are considered the best for typing due being a very tactile switch, some people may find they type faster with Cherry MX Brown switches. It can help to seek out a few mechanical keyboards to feel for yourself what you prefer and to better understand how these switches differ.
Check out Part Three of the Mechanical Keyboard Guide and learn more about the different key switch types and which ones might suit your purposes the best.