This is mine
I agree with you @gmichelbkk, personally i feel that upvoting your own post also shows you love what you wrote, nobody will work hard to create a post and wouldn't like it.
The place i see upvoting your comment as wrong is when you upvote someone's post with let's say 50%, you decide to comment on that post and give yourself a 100%, just on your comment alone while the actual post is carrying a lesser percentage of your upvote.
My opinion though
Thank you @cherylsonty for commenting and sharing your graph and opinion. I have upvoted this comment 100%.