We used to complain that we were in a game demo drought, and now we complain that we're drowning in them. It's a good problem to have, but there genuinely isn't enough time to play all of the demos available during any given Steam Next Fest—the current one ends on Monday—so some prioritization is in order.
If you just want to know which demos are the most popular, Steam recently sorted the top 10 by most played. They are:
