While we're on the subject of voting etiquette, particularly of the self voting kind, there's a new bot on Steemit who only upvotes comments...
He even goes so far as to say that you can go back and upvote your comment after he's upvoted it, and he won't retract his upvote.
So I think it's settled: Upvote your own blog posts, but let someone else get first dibs on your comment curation rewards. You can upvote them... but later (maybe on day 4 or 5).
I'm not about to argue with a bot!