Really like your entries. As the ponytail becomes more horizontal it is beginning to associate with a mustache. If love the #8 font, especially the connected N&D. The style of the girl could be more with only eyes/nose mouth. Maybe not completely from the side. The ponytail is a black spot now, maybe you can 'open' this a bit more.
#19 works best for us. Really Nice work. The letters are great, we love the simple but effectieve connection of the N and D letters. The only comment we have at this moment is the top part of the head of the girl. It is to much a circkel. Can you try to tweak this a bit?
Thanks for your design. We are going to use this logo in our website and materials. This is exactly what we are looking for. Is the font you have used a standard font?