Our Pixel is a good place. I will probably take part in this activity.

All of these things are just opinion as it is a face, and you really can't be "wrong." Still here are my gripes. The first thing that struck me was the brightness and shape of your eyes and the left eyebrow. The brightness seems a touch too much in my opinion. I always thought that eyebrows and eyelids provided a good amount of shadow on the eyes. The shape is really defined in post parts, but starts to bleed out into the rest of the face near the corners. I'm assuming this was done to indicate eyelashes, but the places without seem very blurry. The left eyebrow just seems to be a lot thinner than the other. Next I'll talk about the nose. The highlighted square near the top (which I've always wondered if it had a name) of the nose seems to be very prominent. I would try to soften the transitions leading to it. Your left nostril's highlight makes it appear as though it's very low and very close to the bridge of the nose. Almost like you're inhaling on just that side. You lips are also very heavily shaded making them look almost outlined. If you just broke that shadow near the bottom's corners it looks much more natural.

I love the coloring, and I myself have tried to use "every color," but to no end like this. Very well done.

I don't really make lineart.

And some Gin.