The the QWERTY keyboard dominates text input in computers. This situation is deplorable and pathetic but it can be significantly improved with minimal modification.
The QWERTY key layout (key map) is distinctly awkward and deficient in many ways. The Dvorak key map is better in many ways, but it also has problems.
I use the Colemak key map which is similar to QWERTY (i.e. keys for many common shortcuts remain in the same location), yet it is also more efficient than Dvorak. You can compare them with your own prose.
If one is adept with QWERTY, then learning a new layout may be initially frustrating. In any case, I found Colemak to be a worthwhile improvement even without touch typing (essentially, any layout which maps the most frequently used characters to the home row likely provides similar advantage; i.e. less hunting, more pecking).
Common computer keyboards have asymmetrically staggered rows, mimicking the mechanical typewriters1 they replaced, but the ghosts of implementation constraints continue to haunt us, and (in ill irony) even many so-called «ergonomic» keyboards persist with this staggering arrangement. In contrast, here are some honestly ergonomic keyboards: