Self-voting should not be an issue. If becomes a problem, the ability to self-upvote will be discontinued. But let's be honest with ourselves: just about every Steemian upvotes his own post. It's expected since it's a feature when submitting a new article!

It's just good self-esteem. It's not selfish, just as long as you are active in the community upvoting other good content as well.

I'm upvoting this reply with no shame, so others can read it and do the same. (I'm a poet and don't even knowit) @ironshield