Learning sure isn't impressive.
I've been excited to get new work out with Zbrush, but I've been stuck with learning too many commands and finer points of zbrush modeling. Today I went through importing/exporting, subdiving, mouse modeling shortcuts, tool duplicating, individual point manipulation, real time level of detail and primative/mesh conversions. None of it is too exciting, but it's getting me to where I need to be slowly.
The image below I just screenshotted when I was in the middle of working. It doesn't seem too impressive, but what was going on was. Those are real time interactive booleans cutting away an object by "subtracting" a depth value off the surface. 3d boolean operations have been a nightmare in other 3d packages, sometimes locking up a computer due to over complex calculations.