That's pretty good man! The head as a really cool overall shape, and the hair has a very three dimensional feel. It's obvious too, that you've studied profiles before.
You said you're lookin for feedback so I'm hoping that includes constructive criticism! If not, my bad sorry.
I noticed some things in the design of the profile that are pretty minor but can make a big difference.
The skull shape where the head meets hair isn't round.
The nose is really far back in the face, and pulling it out will fix up the anatomy and make for a better silhouette.
The bottom lip is just kinda strange and almost looks like his tongue sticking out.
The hairline is a bit off
The back of the skull could also be brought in a bit to make the ear stick out more and give it a better silhouette.
I also noticed fixed the parallel lines of the brow ridge and nose, the symmetry in the neck, and just straightened and curved some lines more for design purposes.
Here's my drawover.
And a side by side of the silhouettes. Before on the left, after on the right.
Subtle differences, but the one on the right is more pleasing to the eye and registers in your mind as a head easier.
I hope I helped some!