You should. The fact that you can download immense amounts of custom maps is a big upside. The ease of expanding your playstyles--without depending upon the developer alone--is a huge incentive.Man now I want to get Mine Craft for PC.
It's one of the big pros of getting into PC gaming in the first place. The amount of control and influence the player has on their own experience, less mediated than by consoles, is just beautiful.