Ok step by step:

Lines: Your lines are prone to wobbling a lot, try planning out your lines more with the ghosting method and draw a quick, confident and smooth line in one motion.

Ellipses: In both the planes and table exercise the ellipses tend to be undershot, hit the boundaries a little more during the second and/or third line through the initial ellipse.

Boxes: Rough perspective very often misses the vanishing point by a margin but I can see that it improved as you progressed so that'll naturally come with practice. Rotated boxes rotated well enough that the vanishing point slides across the horizon as intended but they should be more equally spaced apart. Also some of the more diagonally placed boxes seem to be jutting out of the "sphere of boxes" but that's not that prevalent - just watch out for it.

And that's it!