[jbaber]

I find it hard to believe you encountered a single key combination when starting to use vi. Maybe you got far enough to see "ctrl-v"? There are 108 unmodified choices before you'd ever need a combination.

[ralferoo]

: is shifted on almost every keyboard layout, so saving or quitting would require at least one key combination (OK, arguably you can quit with caps lock, Z, Z, caps lock).

But I suspect he meant "sequence of keys" by "key combination" in what was clearly intended to be a humorous parody of the previous comment.

[xeeeeeeeeeeenu]

I always remap : (colon) to ; (semicolon) in vi clones to avoid having to use the shift key.

[draven]

Furiously spamming ctrl-c trying to quit ?

ctrl-f and ctrl-b are the one I use frequently and amongst the first ones I learned.

[kevindamm]

I also like Ctrl-o and Ctrl-i for fast-travel between positions (even across files), and especially that they make sense with an out/in mnemonic.