The more I study the work, and working methods, of "famous" street/documentary photographers the more I realize that those who excel in their field are gifted. Yes, hard work, tenacity, drive, luck, proper choice of tools, what-have-you, are all important elements to the successful career. But there's a special gift of getting out there, in your face (so to speak), getting the right shot, over and over, that can't be made up for by an over dependance on the choice of tools.
For myself, I have a fundamental personality trait that tends to avoid confrontation. This is a bad thing for a person wanting to "be" a street photographer. So, I dabble at it. But I know, painfully so, when I just want to take a shot, but something inside myself won't permit it. Luckily, there's landscape and scenic subject matter. :]