Number wise I haven't counted, but I have one book just for Haunted Mansion, Pirates of the Caribeean, and Nightmare Before Christmas pins.
Another book is just for Star Wars pins from the parks (though I admit there is at least two pages of Star Wars pins from the 90's, licensed from Lucasfilm but not Disney ones) and Indiana Jones pins from the parks.
A third book if Disney pins and this has various ones: Muppets, Scrooge McDuck pins, any Disney dragons they make into pins, Black Cauldron ones, Sword in the Stone pins, various Disney ones like any 20,000 Leagues Under the Sea, Treasure Planet, Gargoyles, any of Kuzco as a llama, and some of the Rocketeer pins (need only a few more to finish that set from the 90's).
I really need to count these now that I have written this out and see all the kinds that I collect.