My most successful would probably be the first drawing, I was never good at drawing hands or adding much details to them; but with this picture I tried my hardest to add so much to it and it came out great. The third picture had the most obstacles that challenged me; I had to make it look like the guy was staring down at his hand and make it not look like a regular 2D picture but more 3D-ish. My second and fourth pictures shows growth in my experience because before I was never really good with proportions but these two pieces of art helped me enhance my skill. Letting me do what I'm best at helps me pull off better images and don't have me racking my brains about it not being good.