I agree that different exercise suits for different body types. Different diet ,proteins etc. are good for one body type and may not be good for the other. But how can one identify their build or type of body.
According to me the first step in Body building or having a healthy body is identifying your body type. After identifying one's body only can one have the desired progress in the stipulated or expected time(as one can clearly follow his/her given exercises ) and then maintain a strict diet for his/her particular body.(could be fat, lean, athletic etc.).
Also please clarify how and based on what is the body classified.