If you want to screw with people, on some Windows setups, right-side Ctrl-Shift can switch from left-to-right to right-to-left text - easy enough to do in front of them without them catching it, plus you have to use the left-side to undo it. :>
I actually unbind ctrl+g because I hit it a lot when I'm going for ctrl+f. ctrl+c cancels out of it fine.
For most stuff I just use autosuggestions.
I disable the caps LOCK FOR SAME REASON.
I make caps lock a ctrl key.
Yeah, pretty much the only ctrl key I use.
I use ctrl-c a lot in the terminal.
Yeah, in terminal I use a lot of ctrl+c,d,f,p,a,e,h,w,k
I use a lot of them shell shortcuts -_-
Ctrl+1 (to8) in a browser to switch between first 8 tabs.
Ctrl+9 to go to the last/furthest right tab.
Also, ctrl is the hack workaround for the infamous one-button mouse.