i found dvorak to be too right-hand prioritised, bruised my right ankle, and the effect got more pronounced until i had enough. dvorak did not do as good in rolling over keys as qgmlwb, which seemed to cap typing speed. qgmlwb is apparently similar to colemak, which is by default installed on more systems. keyboard-layout transitions are kind of painful, because of the concious effort required to reorganise muscle memory. it took me about three weeks to be comfortable. since the switch i havent wanted to switch to another layout again, so that is probably a good thing.