I dont mean to be harsh either, but its the only way to improve. I am in no way a phenominal artist but sculpting a head is very difficult because its soo easy to pick out issues in a model, I mean we are soo familiar with the human body that you need to be very accurate and precise.
Like said before the lips need a ton of work. They do not blend into the head at the corners but feel like they were put on like a mr potatoe head. The overall shape of the ears is ok, but the placement really needs to be worked, there is no blending between the ear and the head.
The clavical doesnt run correctly into the shoulder it is sort of half done.
I would really go to your base mesh and rework the overall shape of the cranium and jaw/chin area. The jaw line looks like it starts going back correctly but then it starts making this weird J type shape when it reaches the ear.
I think there needs to be a bit more of a temple then you have right now.
If you are going for an African American man then the nose is a bit more correct but if this is a caucasian individual I’d say the nose is pretty wide to me.
Its hard at times when you start working on something and really get into it, but really step back and look at it, youll be able to see all these issues that we are pointing out.