Depends on what you mean "most". I could probably write an entire hub on this :D (and will later) but there are a couple types of hubs: Evergreen and Hot Topic.
Evergreen hubs are what I'm trying to make. These are readable year round (tutorials, guides, and life advice) but generally don't have hundreds of views a day.
Hot topic hubs are based on what's hot now. Political arguments or something similar are usually in this zone. They can get thousands of views in a day but once the topic's gone you have to delete them quickly to avoid your rank being affected (and write a new one as each topic becomes cold).
Generally Hot topic hubs will make more money during a short period of time while evergreen hubs will build up over a long period of time. However if you take time and build up dozens of evergreen hubs you'll probably make more money than hot topic hubs.