Hello there, thank you very much for your support! We're currently working on retouching hairstyles, and will add some new ones in the process. If you're interested in more frequent updates on this, you can follow us on Twitter.
Custom hairstyles with manual selection for each part (front/bangs, sideburns, and back) is also planned. We'll write it up on the devlog and our Twitter account when it becomes available!
As for teeth/fangs, let's see if we can work something out. Currently we're still on the fence whether this should be a different parameter (can be toggled) or we'll just make a set of templates for it.
Again, thank you very much for your support!