So, Rangers have Favored Enemies. Some of them have a lot of different variations. So if you choose Humanoids, you have to choose from a truckload of different types(Orcs, Elves, Gary Glitter, etc), and the same thing with Outsiders(Lawful, Evil, Gary Glitter, etc).
But some of them don't have any further variation. So if I choose Animals, it implies that I know just as much about kicking housecats as I do battling velociraptors and wrestling hippos. Am I able to choose a specific type of Animal? (Feline, Dinosaur, Herbivore, Gary Glitter, etc)? Or is that just it?
Oh, and the same thing applies to the other types. You know, Construct, Undead, etc etc.
Just Animal...same for the rest, unless it says you have to pick a subtype then you don't