Game-Breaker: You could zoom in to control your Technicians to cram extra ones into your labs (which can normally only contain four), increasing the lab's research rate beyond normal levels.
Ugly Cute: All of the Machines have faces, as demonstrated by the Reaper page image. The more advanced a unit is, the more 'eyes' it has. A simple low-tech scout has only one eye, but the Knights (some of the heavier combat units) have three. Really advanced units have four. Combat units are permanently angry looking, as our Reaper friend up there again demonstrates. Technicians, on the other hand, are stuck with looking absolutely terrified. Resource haulers look about as smart as a stack of bricks.