If truth be told, people want the good guy to always win. That could be the impetus for collecting Batman figures that characterise the superhero fictional character.
Your Batman figures collection may wander down the path of assembling nemesis supervillains such as Catwoman, Scarecrow, or The Penguin. You may prefer in addition to collecting the star performer, Batman, to own his sidekick, Robin. Try to limit your action figure collection to one room, if at all possible.