1. What exactly makes a great B&W photo? I think a high contrast photo, with nice light and a good tonal range, but really it is a guessing game (for me). My current strategy is to choose a photo I think will look good in B&W, try it out, and instinct as to whether it looks good or is a flop in B&W.
2. For B&W photography is it better to shoot in B&W, or shoot in colour and then convert to B&W?