Ignoring the creative work you mention, I do have some experience with browsing. Prior to my retirement, I read RSS feeds for maybe an hour a day and Hacker News for an additional 15 minutes. After 2 years of retirement, I probably still spend an hour a day on RSS feeds but Hacker News has expanded to an hour a day. I didn't expect to enjoy HN so much given the opportunity.

I don't miss my Silicon Valley job, though...