I like
#17. It's subtle and definitely moving in the right direction. I like the 'flatness' of #18, but it's too literal for my tastes. It says 'lens' but not 'craft'. #19 is very nice, but the colors are a little too bright... I would make them darker and/or more saturated. Check out the colors in my photography at
http://lenscraft.smugmug.com/ ... I'm also curious as to how this would work as a watermark...