My favorite is when my hands naturally come to rest near the top of the keyboard at least once a day they land on the brightness control in the touchbar and dim my screen to black.
Or that I try to press delete, and if my fingers are a tiny bit off, the computer goes to sleep since the touch bar is really sensitive. Even the edge of my finger triggers it.
I learned that while reading email and using "e" to archive that my pinky rests on the escape key. Took me a bit to realize why weird things were going on.
Other than that, I like the 2017 keyboard (assuming mine doesn't break) and touch bar.
That way you can just drag the mouse to the lower-right corner and black the screen anytime you like ...