I think that it is the common practice of newer whittlers and carvers to go for the realistic when whittling or carving the human face. I think this is a natural thing. But, every now and then the finished piece may not be totally realistic. And some times this finished piece may be really a special one. It may have a look that is just a wee bit off of realistic. It may be a caricature. The nose might be a bit too large. The eyes a bit large (or small). Any or all of the features may be a bit exaggerated. What you've whittled/carved is a caricature. In many instances this is not what you set out to whittle/carve. But! the piece is worth studying, to see precisely what the differences are; between the totally realistic and the caricature. Maybe by studying the piece you can plan on whittling/carving the differences; rather than having a surprise piece.
This morning while having my coffee at the diner and whittling a Santa ornament I was talking with some of the fellas. This is my usual morning; eat and whittle at the local diner. We were discussing several items, mostly the Ohio State football possibilities for this season. I was probably paying more attention to the conversations than the whittling. What started out to be a more or less realistic Santa ended up as this:
This is a caricature of the Santa. Notice the exaggerations.