I am a newbie on this site, but here is my feedback cuz I know it's a bummer to just hear an echo in the room. :)

Superimposed Lines: Really well done. I'm seeing a slight bend at the beginning of some lines? Is this from starting the line slowly, then increasing in speed. Dunno. My problem is arcing due to slowing down.

Ghosting lines: Well done. I only see a slight arc on the longest of lines. Great.

Ghosting planes: Good job on accuracy here.

Table of elipses: Nice work of staying within margins, accuracy is good. Elipses in planes are nice as well. I see some elipses are fatter at 1 end than the other but all in all really good.

Elipses in funnels: I see a jump from a very narrow elipse in the middle to much fatter. Maybe gradual increase?

Plotted perspective is excellent.

Rough perspective: Perspective is not my strong suit, but I believe the lines should plot back to roughly the same point on the horizon line theoretically? I think your boxes on the horizon line and below are getting there. The boxes floating above could be a practice thing? Huge improvement from 1st rough perspective to last.

Rotated boxes: Hats off to you! Wow! This exercise blew me away and I'd love for you to give me a lesson. Sorry to not have more to say.

Organic Perspective: Believable perspective. I see more boxes with the tops viewable than with the bottoms. I think this is a preference thing. Just thinking of when you're warming up or practicing you could work on the boxes from a different perspective.