Congratulations on completing the 250 Box Challenge!

You did really well overall and I can see you improved a lot by the end of the challenge! When I compare your first few pages to your last sets of boxes I can see that your over all mark making quality has improved. The line weight you add to your boxes becomes more subtle and really pushes your boxes forward. By the end you also do a much better job of getting your sets of parallel lines to converge consistently towards their shared vanishing points too.

One thing that stands out to me is your hatching. It is not very consistent with the rest of your mark making and looks more than a bit lazy on your part. Keep in mind as you progress through Drawabox that it is important to put in the time and focus required to execute each line correctly and to apply the ghosting method to every step of the process, as explained here. This applies to your hatching as well.

Finally while your convergences do improve overall I think this diagram will help you further develop that skill as you continue through Drawabox. So, when you are looking at your sets of lines you want to be focusing only on the lines that share a vanishing point. This does not include lines that share a corner or a plane, only lines that converge towards the same vanishing point. Now when you think of those lines, including those that have not been drawn, you can think about the angles from which they leave the vanishing point. Usually the middle lines have a small angle between them, and this angle will become negligible by the time they reach the box. This can serve as a useful hint.

Good luck with lesson 2!