I thanked the check six voice for almost a week.
Didn't know where the check 6 was coming from for along time! Did the alt-F4 before my brain remembered what the command actually was for... Attacked friendly CV's. Dropped supplies instead of troops a few times. Learned about weight and hills close to bases with heavy buffs taking off...
The one that really catches me (STILL) is if I attempt to type with no text buffer up, I accidentally turned off "mouse-look" using the "H" key.... Took me forever to find that command... Only JUST learned the difference between range and room... Had stall limiter on for longer than I care to admit, which led into the combat trim off at low speeds.
There's alot of subtle little things that take awhile and some involvement to learn.