Respectfully, I think the opposite is true. You only need to look at how many people convert shots to B&W, and apply "film grit" effects to see that for many people B&W = Art, and therefore any photo looks better in B&W. Also B&W hides exposure mistakes better, and just generally looks more like "proper photography" to a lot of people.
Originally Posted by steven_e007
But back to the OP's question, I think it's worth at least trying some colour, there are some lovely BW nature shots in this thread, but I do think that nature has the ultimate colour palette, and it's a shame not to use it.