We like the gradations of the two curves on #16, but the use of gray is boring. #15 is interesting, the symbol seems to denote connectivity, but the lack of color is problematic.
#42 - make the text black, and make the color more red than orange #43 - the dot over the right most i needs to be lined up with the i. The font is somewhat too playful - please try one that is more sophisticated.
Also, if possible, please do not withdraw your designs - we would like to see and evaluate them.
nabuy83. Thank you. please take a look at this: https://dl.dropboxusercontent.com/u/1494821/CiviLogo/civi03.jpg This is a very quick hack to give you an idea of what we would like to see. Do not take the linked image literally, but note how the color simply fades but stays the same color. We are just trying to get the idea across - you are the artist and you should make it look good.