Hello! Here is my critique. Let me know if I say anything wrong or unclear!

  • Lines Section

For the Superimposed Lines exercise, your lines appear clean and confident, especially on the second page shownn on Imgur. There doesn't seem to be any major instances of fraying on both ends of a line, which suggests that appropriate time was taken to place the pen at the starting point for each stroke. Doing so helps in preparation for confident strokes, so well done there!

For the Ghosted Lines exercise, your lines seem straight and confident, and it may even be worth mentioning that your accuracy is rather good as well. Accuracy, although not prioritized over confidence, may continue to improve with time and practice.

For the Ghosted Planes exercise, you seem to have grasped the concept of confidence using the ghosting method very well! On the second page shown of the exercise, there seems to be a box missing the lines drawn to its midpoints. Other than that, the only suggestion I have as of now is not to press too hard at the beginning (or end) of the lines where the corners are rather dark compared to the rest of the planes. These may also come from plotting large points. However, there might be multiple factors influencing this outcome, such as the type of pen used.

  • Ellipses Section

On the Table of Ellipses exercise, there is a small amount of wobbliness concerning some of the ellipses' lines. If this is an issue of accuracy, then it will continue to improve with time and practice as you become more comfortable with ellipses. If it is an issue of confidence, however, I would recommend practicing ghosting through an ellipse several times before putting it down on paper so you can become more familiar (and thus confident) with the coming strokes. Some of the ellipses in the tables seem to overlap the boundaries a small amount, but as this may be an issue of accuracy, you will improve over time and practice.

Overall for this exercise, your ellipses tended to be more even or circle-shaped. For the future, I would recommend drawing ellipses with a larger variety of degrees and slants.

In the Ellipses in Planes exercise, although many of the ellipses aren't completely accurate, you seemed to prioritize confidence over accuracy, so well done there! It may be worth mentioning, however, to try hitting each of the midpoints (where two of the lines touch the plane) rather than focusing on simply hitting the boundaries.

In the Funnels exercise, you did a great job for the most part in keeping the ellipses aligned to the minor axis (the line cutting through the horizontal middle of the funnel). The funnels themselves are very neat, and additionally your ellipses fit snugly within the arcing boundaries. As a suggestion, you may also want to try drawing ellipses which increase their degrees as they move outward from the middle of the funnel.

  • Boxes Section

On the Plotted Perspective exercise, your boxes appear neat, however some of the depth lines are not extended all the way to the vanishing points, so make sure follow through when drawing them.

For the Rough Perspective exercise, your boxes appear to have dark corners like in the Ghosted Planes exercise, which (apart from the pen) may have to do with plotting thick points. If that is the case, I suggest plotting slightly smaller points, as the written content for Ghosted Lines suggests that "ideally the resulting line should swallow both of them up". Additionally, its worth mentioning that the width lines of the boxes drawn should be parallel to the horizon while the length lines perpendicular to the horizon. Remember that this is because the exercise exhibits 1 point perspective, where two of the vanishing points are so far off that the corressponding lines or convergences for one vanishing point become effectively parallel to one another. It may also be worth mentioning that your depth lines are fairly accurate, for which again accuracy will continue to improve with time and practice.

For the Rotated Boxes exercise, try to keep the gaps between the boxes as consistent as possible in order to infer the placement of boxes in 3D space more efficiently (this is explained briefly in the written content for this exercise: https://drawabox.com/lesson/1/16/guessing). Additionally, a few of the boxes don't appear to actually be rotating— or at least, not to a large extent. This mistake is explained here in the written content for this exercise: https://drawabox.com/lesson/1/16/notrotating.

Finally, on the Organic Perspective exercise, most of your lines appear confident and neat, as in rest of the work for this lesson. However, I would recommend being more careful when applying lineweight to the boxes. Correct me if I am wrong here, but generally lineweight is added for the purpose of conveying which object(s) should stand out to the viewer, or in this case, which box is in front of which. I suggest applying lineweight to the boxes closer to the viewer, along with perhaps exaggerating the sizes of the boxes to convey the illusion of depth more clearly. It may also be worth mentioning that making mistakes while estimating perspective is normal, and that it will become easier through time and practice and when you tackle the 250 Box Challenge.