The right side has 4 out of 6 of the vowels and 3 out of 4 of the other sonorants, which could easily be argued to be the more sonorous or pleasing sounds in a word. 7 out of the 11 right-hand letters fall into one of those categories.
By contrast, the left side is only 3/15 sonorants. Further, the left side has all the sibilants and a strong majority of the stops.
Pointing out that right-side letters correlate with agreeability is an interesting finding. Claiming that which side of the keyboard the letters are on is the _causal_ factor for agreeability strikes me as lazy.
"i lack imagination. At least, that's what my two children 'qwerty' and 'F12' tell me" -- Milton Jones.
Are there enough YC company names to repeat this result with statistical meaning?
I wonder if there is any correlation between domain name prices and the QWERTY effect?
P.S. This is the internet, not Saturday afternoon on Radio 4 - they won't get the Milton Jones reference, and if they did, they would not get the humour.
Anecdotally, all of my children have names with more letters from the right side of the keyboard - but I'm left handed.
[0]: http://xkcd.com/327/