Sometimes I wait in places for something to happen, sometimes I'm on move searching but it's always more than just snapping. I look for leading lines, patterns, repeating shapes, contrasting tones and an interesting subject or moment when all of this come together.
iamascientist hit the nail on the head.
Look a the work of those that did have done it very well.Read their philosophies and how they approached it. They are widely varied but there are some common threads that run through and reasons why their work is singled out. Here is a link that I've probably posted in this thread but worth a repost. A good $13.00 spent and a great insight into some of the best.
Right, there might not really be any rules, but whether taken by a photographer this past year or 60 years ago, I typically gravitate towards "street" photos shot with wide to normal. Obviously, there are exceptions, particularly with short-tele's.
As always, use what's best to reflect your vision.
[You know, haven't seen the movie, waiting for a hard copy, since I'm not set up for streaming on the tube (and I ain't watching it on my Macbook Air).]