Black and white photographs have coming back over the years. People starting to appreciate and understand its essence. I love black and white images as well but I don't use it for the entire shoot. I believe some images need to be show case in a black and white feel while other should remaining in color. Here are some the factors that I use to determine if an image would go black and white. Documentary - when I do behind the scene of the shoot or documented an event then I feel the black and white photos really allow the user to focusing on the details of the subject. Sometime, it helps reduced many distracting colors in the background as well.
Details - Showing detail from an event or wedding. Black and white photos really made these object pop.
Emotions - I love showing the emotion of my couple and my subject in the photograph. When I stripped away the color of the image, the viewer has no choice but to grasp the feeling and mood that each subject in the photograph displayed.
Classic Beauty - when I capture a moment or an angle that show case the beauty of my female subject then I think one of that image should be black and white. It's just so timeless and amazing. Even many years from now when all the color tone and trend changes, you can still appreciate that black and white image. You can't really tell when it's taken and that made it timeless and fine art.