premium words make domain premium, not how you type it and how many fingers u use it or one or both hands. easily remembered words are more premium i guess than what you have asked here.
Yes it can be on feature of domain if you add that "you can easily type it with one hand" ...
interesting question.
i don't know about more value, but if you can type a word with one hand, it's likely a very good word.
unless it's like LLLLLLLLLLLLL too long