I would say on average between 1-3 hours a day.
I enjoy my time on Steemit mostly curating. Though sometimes when I feel creative or have an original idea, I like to blog about it.
I leave comments for my favorite writers and when I feel there is something I can add to the conversation in terms of value. Other times, I engage with the content like if it is a contest or an airdrop announcement.
I love reading and am fortunate to be able to read fast. That's why on a free and long day, I am able to find good posts and read on a variety of topics on Steemit. This lets me not have a need to visit traditional news and blogging websites.