Hello I'll be handling the critique for your 250 box challenge.

Linework

-Starting by your linework, I can see that you have used the ghosting method to good effect and your lines are drawn with a good deal of confidence. The first thing I want to call out is that you have a tendency to repeat your lines multiple times. if you make a mistake do not try to correct it by drawing on top of it, as it only makes it stand out more. The best thing to do is to give each mark as much attention and focus as possible, remember to go through each step of the ghosting method as explained here in the ghosted lines homework section. By getting rid of this habit you will start to develop the patience and discipline necessary to do your assignments to the best of your ability.

-The previous point has a lot to do with lineweight, it is good to see that you are applying it, the important thing to remember is that we should be very subtle when using it, so only add one superimposed line. If you end up making the lineweight too thick you will take away the solidity of your forms and turn them into mere graphic shapes. Here is a diagram that explains how to apply lineweight correctly, and you can also see it here applied in the context of a box.

-The hatching is looking tidy rather than rushed, although it could be much tidier. Keep in mind that each line is no less important for being part of a larger group, give each one of them as much attention and focus as necessary. I did notice that your linework got better and better as you moved through the challenge, but there is still room for improvement, so keep practicing.

Box Construction

-You have used the line extension method correctly for all of your boxes and all of them converge which is correct. Overall you did a pretty good job estimating the vanishing points of each set of lines, what you should keep an eye out for is lines converging in pairs as shown here, one thing that can help is to start thinking about the relationship between each set of lines and the angles they form respective to their vanishing points. This diagramshows these relationships, you can see that the inner pair of lines will always be quite similar and the outer pair can vary a lot depending on the location of the vanishing point, the further away you place it and the closer to parallel they become.

-Another thing to keep in mind is that you should experiment more with the rates of foreshortening, you stuck to boxes with dramatic rates of foreshortening, some of them had such extreme foreshortening that their sides were turned into triangles, this is not really all that important and besides it happened in very few instances. What I want to really put more emphasis on is rather you should try boxes with more shallow rates of foreshortening with the vanishing points far away from the page. I also want you to keep experimenting with the orientations and proportions of your boxes, if you have trouble coming up with new ones, you can take a look at this image and use it as reference.

Experimenting is a good habit as it helps us to form a more grounded understanding of the concepts we are exploring here, so I hope you keep nurturing this habit in the future.

Okay, you are moving in the right direction, I just want you to make a few more boxes, I'll leave the revisions below. Good luck!!