#1 the color version is not so nice, changed it to black and white, hope the lines 'come out' more. guess didnt work.
#2 was intended for a silloutte, found out there's still some details on the pot(?), decided to leave it there.
#3 is backlit, perhaps should have try using flash(I always forget I have it...)
#4 dont like the color version, so try B+W.
One question, for those of you who shoots on digital and do b+w offten, how do you usually go starting from a color jpg?