I think the shape of the nose is great for the character. A couple improvements could be made to the topology.
1. The nose (and maybe large parts of the sculpt as a whole; is this with subsurf?) has far more geometry than it needs to accomplish the shape.
2. You got most of the important edge loops, which is great. It would be good to have one more loop that circumscribes the nose and mouth.
3. There is a six pointed pole on the center line right between the eyes, This is not an ideal placement since it obstructs the center loop and will potentially experience significant deformation during animation (if that’s in the plan).
Great job overall though, especially if retopo is a newer endeavor for you.
