I really like this group of pictures, but it is proof-positive that photography is most often about timing and luck. I separate the two because timing implies some measure of skill.
After timing I usually have a debate with my fellow photographers about whether it is, experience, skill or equipment that comes next. Because so much of my shooting style relies on it, I am usually on the equipment camp next. Their argument for skill/experience/talent is that a good photographer could shoot great shots with any camera, this is true (this was a Canon S120 point and shoot held at arms length without looking at the LCD screen), but having the right equipment at the right time can make the shot so much better. “The best camera is the one you have on you.”