If you take a picture in colour, don't open Photoshop to change it to black white because it looks better!
When you take the picture, it's YOUR DECISION TO MAKE, to switch your camera into black and white mode.
Photography is all about feelings, and sometime you just get that feeling to take that picture in black and white.
A good tip : when you want to take a picture of something that looks sad or "lugubre" (example a dead tree), most of the time, it'll look better in B&W










