We like the thickness of the word mark on #57 but the icon on #67
We don't like the green eyes and mouth on the smile in #67, black would be better.
The wave is much better in #67
The smile face isn't quite the right style, maybe the eyes are too oval and the mouth too exagerated, we can't tell what it is but we don't love the expression for some reason.
The emoticon is much better thank you. We like the emoticon, the wave and the word mark in #81 more than in #79. We like that the wave is defined with a dark stroke as opposed to the wave in #79 where it appears to be lost a bit. The word mark in #79 has too much style to it.
I can't give you much more feedback for #81 - We think it is a very nice logo. This will be a tough decision!