I have asked several people to look at the designs and I thought #17 would tend to target a Male audience - however the female people I have had look at the design also like #17.
Could we see some font and colour variations on #17 and #18.
We just had a large number of people take a look at all the designs and had to reshuffle a lot of them around.
We still really like #18 - would it be possible to give it a white background - and perhaps a glossy look - make the green part look like glass - or like its wet to touch.
Perhaps see another version with a reflection under it - only slightly like the flickr logo.