As a illustrator/graphic designer, I've been happy to see that the design of Shadowrun books has improved greatly over the years. What I haven't enjoyed though, is the declining artwork. It seems that the new books have moderate to low-level artwork in them.
So, my question is what book (sourcebook or main rulebook) were you happiest with the black & white inside?
cheap plug - if you want to see my artwork, look for the Dungeons & Dragons - Guide to Playing comic book coming out on Free Comic Book Day. It'll be distributed around the country on July 3rd at book and comic stores by Wizards of the Coast! I also wrote the story in that book. Okay, done talking about myself.