|Coit Tower, San Francisco - Holga 120N Portra 400VC, color conversion via PS CS3|
In color, the shot is okay, but a little flat. In black and white, I think it really comes into its own. Here is one of those situations where the digital darkroom kicks the wet darkroom's ass without even trying that hard. Once scanned, I can take the color image of this shot into Photoshop and not only convert the image to black and white, but do it in a way that allows me to simulate the effect that would have been achieved by taking the shot on black and white film with color filters. For example, in this case, I dropped the reds out of the image before conversion, which gives an effect similar to having shot the image with a red filter - darkens the sky, emphasizing the clouds.
Black and white films provide a feel to the image that can't quite be matched by the effect of a color conversion (black and white film has a very broad tonal range, for example - broader than color film and much broader than you will get with a digital camera). I like shooting black and white directly, but when shooting color its nice to know there is the option of producing the end image as black and white.