Colour has.. an emotional resonance that black & white is lacking, for me. The qualities of light on surfaces are better illustrated by monchrome, and textures and details illuminated to a greater degree, but you also lose a great deal: humans respond instinctively to blue sky, or deep green moss, or even the subtle hues of skin.
It's easier for viewers to remove themselves from the subject and better view the design of the photograph as an artwork if it has no colour, I suspect- and it further removes the photo from all the other images we are constantly bombarded with- tv, snapshots, etc.
However, my own goal is to show how beautiful my subject is, as opposed to the photograph itself. My photographs don't matter: the people, days, and places they captured do. For my good friend (and a much greater artist) , it's the other way around, and so he shoots b&w 90% of the time and I shoot colour 90%. These are a few of my favorites, which without colour would be a shadow of themselves:
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..but I think it all comes down to how you see the world, and what you respond to, that shapes your natural visual language- in terms of chroma as well as subject matter