m1tCh,
Welcome to the Anatomy Forum, and to CGTalk! Thanks for posting your work here.
Don’t worry about other peoples’ work as much, seeing it is for inspiration, not intimidation, purposes.
With respect to your model, I think the main bit to notice is that the features are looking a bit alien at this point. One of the reasons is that the eyes do not appear to sit within the eye sockets of the skull. The person should have a fold above the eyelid unless asian, and a bit of depth plus a clear transition from the area of the eye and the area of the eyebrow ~ right now there’s just a rather flat transition which is unrealistic.
Also, the nose is a bit large, and should be reshaped a bit. Take a look at real reference, such as:

You should definitely try to work from real reference whenever possible ~ even if you collage your own reference together from other features. 
The other thing to notice is the flatness / pointiness of the ears. This is really what gives the person an alien appearance. Check out ear reference as well, from all angles, or look at your own ears and notice how soft and rounded they are.
Hope this helps!
Definitely post an update if you can. 
Cheers,
~Rebeccak