I suppose this is the right place to ask...

But is there any way to make a list of mixed media here? Like that lists both actors and movies? Or actors and games? I want to make a list of things I probably couldn't live without, and it would include books, games, movies and other such things that have in some way made an impression on me. So I was wondering how to go about doing that.

Nope, it is not possible. You can make lists mixing TV shows and movies but that's it, no other mixes are possible.