To be fair, the Xbox version probably has a lot more features then when people first started playing Minecraft PC when it was in its alpha, and people got addicted to it even then.
But I don't know how much stuff from Minecraft PC the xbox version is missing, but after you spend an ungodly amount of hours playing it, you'll get bored, while there are a plethora of very well designed mods for the PC that keep things interesting.
For example, I've been playing the Industrial Craft mod with a friend which introduces electricity to the game. You build various kinds of generators that create electricity and you use wiring and transformers to transport this power to machines that do stuff for you, such as the Macerator which converts 1 ore into 2 dust, and each dust makes an ingot. So you get twice as many ingots for your ore by using power. It's all very interesting and adds quite a lot to the game.
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The batman villians all seem to be one big joke that batman refuses to laugh at - SantaRPG