Welcome back,
amazing sculpt!
A next step could be to add wrinkles.
But that’s out of the scope of the course and can be done with paint.
Have fun!
Looks like Rick.
He looks like someone I seen before. 
Good job! I haven’t gotten that far into the course, so no idea if this is hard to do. I hope I can sculpt like this too.
I’m surprised it turned out so well. I did get lost in the sculpting and hours went by 
The wrinkles were a bit difficult to bring out, but luckily the reference had pronounced muscles/tendons so was easy to draw those out.
Here’s the reference
Good job with coloured in eyeballs it will look great.
I remembered who the sculpt reminded me of after posting the reply, it reminded me of Robin Williams (actor).
The reference looks tough to do — so many details. 