I choose D-L Alvarez's piece that exemplifies a type of drawing that I could see myself emulating.

Graphite paper bag,  one of my favorites.

Conte paper bag

Fish eye view,  difficult to figure out and draw.

Bug's eye view

Bird's eye view

Three point perspective

Two point perspective, another one the dog damaged.

My version of one-point perspective.
If you note, the paper is crinkled badly from the dog spilling water on my work.
She wrecked some and set me back a few.

I picked this one to show a fish eye perspective.  I think this is a difficult concept to accomplish.

This would be the view from down on the floor maybe a cock roach.   I think it is interesting that if you turn the piece over it could be a bird's eye view.  All about the three point perspective used in the composition.

I liked the foreshortened look of this dog's nose, it makes the dog look friendly and about ready to lick the artist.

I had chosen another view for bird's eye perspective but I liked this one better as it actually includes a bird.    I would say this is a one-point perspective piece.

This piece grew on me each time I looked at it.  I wouldn't say I was a big Matisse fan but I choose his "Strana Forandola" because it showed life and energy.  This piece uses a split complimentary color scheme using royal blue, yellow orange and red-orange.  I believe he used the thumb tacks, that were there to reposition the pieces until he was satisfied, to add an extra interest to the work as sequins and to allow the joints to move while working the pieces.

Steadfast Tin Soldier and His Ballerina
I created these paper cuttings in primary colors. 

 I used red, blue and yellow,

 although,

because of the shadows,

they look like different colors in different places.