I get cross with myself because I know I can do better. Producing below par stuff leaves me feeling dejected. The following was done with experimental use of Staedler highlighter pens. What I like about them is they do not leave overlapping lines where one line crosses another, but combining colours is possible as they are slightly translucent.
I was annoyed that I did not follow through on my original intention – that is to substitute limited colours for the tonal values. Instead I just used the nearest colour for skin tone, cheese plant leaves and curtain etc. It is important to remember that learning from mistakes can produce interesting outcomes though.
As a test of materials this worked fine but I do need to follow through in my intentions.
Maureen Walker's blog: An Artist's Journey 