After seeing my portrait images my lot of friends & visitors asks me about my used equipments & where that shot was taken? I found most of them are having keen interest to know which was the lens I have used. But I guess sometimes they miss important thing about the expression of the subject. In portrait photography that is most important. Did you take care your subject is comfortable or not? It's not a major concern when you are shooting your family members but not is the case while shooting strangers. People photography requires a special skill & it comes with practice. I know whenever two strangers meet it's difficult to crack the bottleneck of not being comfortable with each other unless you have some work. I have found most of the people (at least in India) are eager to be get photographed. As I have written in the description of my many images on Flickr I try to have conversation with them. I take their early shot knowing that they are not my best one ...