My view is that upvoting is for quality content and I am sure you feel that you produce quality content. I feel upvoting your posts is fine.
I do not upvote my comments though. Having articles upvoted helps to get attention and push the article forward.
Just my views.
Thank you for this answer. I think you're exactly right. I try to put out quality content daily now. Sometimes I would just like a comment, just to see someone is reading them.