I second that. One of my favourite things to do when I’m bored is to flip through the INFO manuals and see what functionality of Emacs (or some of the often equally-well documented packages) I haven’t explored yet. It is so pleasent to navigate them from within Emacs once you get used to the info mode keybindings.

In general, I like how it is easy to access any kind of information about Emacs (keybindings, commands, variable values, active modes, text/face styles, etc.) from anywhere within Emacs through the C-h shortcuts or via “Help” in the menubar. Contrast that with what is usually offered as “Help” in most other applications and how hard it is to find just some basic piece of information.