It really is getting tiring how marketers are ignoring that nobody wants to be a part of the "BLAST". It is about time that we marketers stop doing blasts and start building our software which caters to individuals (at least if we want to be successful).
I always like to look at this. One can gauge the "overall sentiment" of your site by looking at this list of words. Google likes natural content, and natural content keeps the visitors coming back to the site (returning traffic is to websites what returning customers are to a business).