Ctein over on The Online Photographer has a cautionary tale about missed opportunities. Every photojournalist I’ve ever met has a story about the photo they didn’t go after. (I don’t like to talk about mine.) (Any of them.) (Though I’ve gotten better about them over the years.)
If you’re reading this, you’re probably young and impressionable and desirous of a successful career. Take Ctein’s advice – take chances, be flexible, go after those once-in-a-lifetime possibilities.