Gone Too Deep?

Today I was Skyping with my Belgian friend (who has British citizenship... long story) when she had to chat with her sister. While she was gone, I was looking at some of my friend's posts, including one about the The Brilliant Book of Doctor Who 2011 and by the time she came back, I was giggling with excitement. She apologized for keeping me and I said something to the effect, "No worries, I kept myself busy... looking at... stuff..." and she says, "Doctor Who?" AM I BECOMING THAT PREDICTABLE?! Also, is it concerning when your own British friend is worried (albeit, jokingly) about your current Doctor Who obsession?
Regardless of the status of my obsession... Should I get this? Or is it a cheap fandom trap? I don't want to buy the cheesy stuff, though this does look fun... :D