As for aesthetics, I have seen some that weren't too pleasing. Some had mongo size teeth that just didn't look right. Again, more teeth, more time.

One thing that has changed from very early on is the teeth originally didn't come to a point but had a bit of a "flat" which is far more durable than the sharp pointed teeth. I have seen a few knives that had the tips broken. I would suggest that although most will never use the teeth on any material (i.e. metal) that would be more inclined to cause damage, it would be prudent if they were still ground with the "flat" at the tip.

scott, didn't one fella do the teeth for like forever?