#20 - I like both the color scheme and the idea. It doesn't stand out as much as I'd like, but it's definitly a good idea. Could you play around with it a bit and even mix up the colors a bit?
#21,22 - Both are good, just plain.
#23 - This is just a bit generic for what I'm looking for
#25,26 - I'm not sure what it is about it, but how this is shaped reminds me of intestines to be honest. It may be a good idea if put together differently.