to start off, lol nice avatar v2 looks best i like it, what you can do is pick an element from the sig and put color in it, so that it stands out, would look nice to
b/w is better i think. but I don't like how it goes from graphics to, what looks like, a real photo of a city. it just doesnt look like it matches.
looks good man, and id say black and white looks better too.. i'm not sure what it is though they are nice colors, i think it may be because it goes from that colorful right into the dull colors of the city scene behind him, but that may not be at all.. either way, nice work.