@gduran, I don't really have an issue with upvoting original blog posts... and-- after all-- the default setting when you post is to upvote the post on publication.
What I am mostly concerned about is exploitative behavior on junk content. For example, a person posts something and upvotes themselves. Fine. Then 10 people come along and leave comments. The original poster then goes in and responds "thanks" 10x and then does NOT upvote the 10 comments, but upvotes their own 10x "thanks" at 100%, thereby burning through their daily voting power without giving even a whisker back to the community.