Sort:  

No, you don't have to do anything. Today, I've been replying more than upvoting because I messed up and blew through too much SP out of ignorance of how the system worked. Lesson learned. But actually, I've been making some Steem friends, finding people to follow, and getting followed by focusing on replies, so I'm discovering how valuable that is. i.e. your comments can add value to a post and often, authors really appreciate feedback.

I almost always reply to comments on my own posts. That's mostly because I really appreciate anybody who is engaged enough to leave a useful comment.

I was up voting so much I got below 30%. I'm trying to get it back up to 100% now