[swah]

So you can't type sdf in your code?

[stralep]

You can type it... Just slowly

My combination is just kj.

[cageface]

I have jj in my .vimrc.

[zem]

vf is the easiest-to-type two-letter sequence i could find that doesn't appear in any english word. other languages' mileages may, of course, vary. (and if some chavfucker wants to object, well...)

[fortes]

I use ;;

[cageface]

Not a lisp programmer, I take it.

[telemachos]

I'm less learned: the first thing I thought was case branches in Bash scripts.

[X-Istence]

This would suck if one is also Dutch. We have kj appear rather frequently in words.