Judging by the 'smoothing' on my laptop keyboard 'J' and 'N' and Left Ctrl appear to be the most smoothed, followed by F, H, K, L, B, and space bar (under right thumb only).
The next most smoothed keys would maybe be E, T, Left Alt, Left Shift, Tab, I, O, R, period, semicolon and enter.
I just learned Emacs after having used vim for a long time and the heavy use of Ctrl prompted me to swap Caps lock and Ctrl (for the first time I've tried this).
It works out great, and in fact it's made me start to use the right modifiers, whereas before I only used left modifiers. Emacs bindings were painful to get used to at first, and in the end I'll probably try vim bindings in Emacs, but the lisp scripting and overall environment seems more consistant than having to deal with vim script.

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