I have watched through all the videos (though it's been a couple of years), but as far as following along, I've only ever gotten through the sculpting stage once. That bit turned out well, but I never made it past that. Have done the planes of the head I and II a dozen times at least. But I will make it through the HUMAN course... somehow... eventually :D (If I can just keep from being distracted by some new shiny object...)
I really have been wanting to get through this course ever since it came out and would like to get it done :D
Got the eyelashes added. Also tweaked some things to make the person feel less aged. I used the newer hair system, rather than the particle one, but still used Kent's grooming, though I tweaked a lot of the settings to make it look more like references I found.
Only about 85% happy with this... but considering I was trying to balance Kent's particle system with trying to figure out how to achieve similar results with the geo nodes system, I think this is at least passable as a first pass and can let this marinate a bit while I work on other parts.

Full bust so far... A bit too much in the eye kinda making it look almost like a black eye, so will tone that down and still just a couple more skin materials to go through and the shirt material. Fixed the overhang over the eye so it's more natural and the lower lip tweaked. Seeing the multires fix on the sleeve I need to get to. But generally, liking where this is going. Going to try to finish materials by tomorrow so I can get started on the hair... which is where I think people will finally start recognizing this particular portrait.

Now that you mention it... after fixing the overhang, it does seem a bit "wide eyed". Waiting on the skin specular variation render to run, but I'll add that to the things to revisit :D
Going to circle around back to finish the skin (only have a couple of steps left to implement, plus tweaks), but skipped ahead to the shirt. Instead of the fully procedural method Kent used, I had a cotton cloth texture from Poly Haven that I used, modifying the color and adding a noise + AO to add a little dinginess. I don't think I ever realized how much softness adding even a little fuzz to clothing would add, even if it's subtle

Oh yes, that fuzz really works here!
A bit of nitpicking:
Something feels off about this texture and I don't know what; maybe it's the Scale (Texture too large), the Rotation (I know nothing about fabric, but I'd expect it to be rotated 90°, so it wouldn't stretch vertically (from gravity) as much as horizontally. Not cloth science, but my imagination!), or something else. Anyway, you know how people sometimes say, that Texture looks Procedural? Well this one looks like an Image Texture (to me!).
But, what bothers me more, is that the cloth looks too thin, which should be easy enough to fix.
I'll have to double check, but I think I may have forgotten to turn the solidfy on or something. I was having some issues with the particles only showing up on the inside, so I think I had turned it off.. As for the rotation... I think it's right around the collar, but for the rest, looking at reference, I might have that wrong. After I get done reworking the skin I'll look at that.
See: https://cgcookie.com/community/12388-human-course-hoodie-fuzz-bald-patches
The Images are 'lost', but still.
Not sure if how much of it is touching up the skin painting and how much of it is "reworking" the material, but for once, I'm feeling happy with how the skin is looking in different lighting. Eyebrows need work and not sure what's causing the "pale" under the brow. Still need to finish the Zones of the Face and blemishes. I'll probably touch on the eyebrows while working the hair. But coming along! (Overall, it feels less "pink" than my references, but doesn't feel like "makeup" now.)
spikeyxxx -- turns out I did have the solidify turned off for render. I moved the particles back below it, and it rendered fine... so not sure what was going on earlier. Also, did rotate the UVs back to vertical and increased the scale value from the mapping node I was using for that.

As I'm going through the HUMAN course and looking at my texture maps that we baked for displacement, I'm noticing that one of them has bright area over the brow. This is a map baked with render at full and viewport at 2 levels. (There's also a bright area around the base, but that's going to be under clothes and hidden.) One reason I've been trying to figure out what's going on is that I've noticed particularly around the brow that the colors in the textures where we used the maps are off and this is the one thing that doesn't quite seem like everything else.
When I looked at the difference in position at lvl 2 and lvl 6, I'm not seeing anything and there is pore detail there that's picked up in other maps, but not sure why there's bright area here. Any suggestions? Thanks!

Also, tried playing around with the skin color map, playing around with desaturating the original and various mixes of both of those with a pink skin tone and landed on this, which feels more natural to me than the one from yesterday. (I was happy with that one, but felt it was still a little too saturated and not enough pink tones).
(In this , you can see under the eyebrows the discoloration I was talking about in the previous post.)

For those white areas, that means that the Sculpt is further away from the Viewport. At the moment, everything above, say 0.9 becomes 1 through your Colorramp. You could try lowering the Value at the right Flag. Or just moving it further to the right, but I guess, that might not be enough.
Viewport is on flat lighting with object color in Texture mode, so I'm pretty sure this is in the bake itself, not as a result of the color ramp.
Problem is that area is so much brighter than everything else that trying to fix it with the color ramp is really hard because you're crushing the others so much or flattening out the overall color just to try to make that less bright.
I'm tempted to just paint on the mask in that area, but the biggest thing I was wondering is if I did something wrong with the bake that caused it in the first place.
Figured out how to fix one of the bakes that was bothering me and added the zones of the face and blemishes. REally like how this is turning out!
