i have this picture:
http://mrod.files.wordpress.com/2008/04/harold-kumar-2-200710220518518381.jpg

I see most people do not use multi-color. This would look much better in color.
Do you know why people don't use it?

The only reason not to use it, is if you don't have the money to buy more color ink, because color is, in most cases, more expensive than black. So the simple answer, black to save money, multi for quality, but more money spent in the long run for multi-color.

I just did mine in multi color cause when i first started printing it didnt look as good in black and white so i changed to color. It seems to come out dark when i did black and white. but i do notice that when it was printing in black and white i used more of the black ink faster. I like it better in color. I only changed 2 of my colors once. i will send a pic later when i am done. I am in the process of framing them in individual frames now.