One thing that always makes me annoyed by cisco is the cubicles that are pale-puke green and sick-of-my-life grey. This seems to also be the theme with the exterior of the buildings. Also lining the walls of the interior of the buildings are really old pictures to -i guess- spice things up visually, but they are faded out now so are kind of depressing to look at. sometimes I find myself just not wanting to be inside those buildings, so work from home.
Honestly, all they have to do is every once in a blue moon add a new picture to the wall, and it would make a world of difference. I saw the other day they were painting one of the walls orange. That made a HUGE difference in that area.