The pic looks fine on my monitor and based on the calibration charts my monitor seems to be right on the money. I've gotten the same responses to my images before I think this being an art community Renderosity should have one page dedicated to the kind of charts that are in the link above so that people can check them selves before leaving feedback like "it's too dark" or "you need to lighten it up". Constructive criticism is fine and good but it is annoying when what they see as too dark and indiscernible looks perfectly good with just the right amount of shadow to me or what they see as an improvement looks washed-out.