An artist called Samuel Silva does ballpoint pen drawings that are pretty amazing. Check out the link in the Huff Post. Even if I didn't want these on my walls, and however much one likes modern abstract 'art', something makes me think there is more skill involved in producing these drawings than there is in putting what look like daubs of paint on canvas, and for that the artist has my repsect. Can't seem to drum up the same respect for some more famous 'artists'.
I've got another 'keen'... Ouch!