Lately my guilty pleasure has been Star Trek. I never watched a single episode in my life before last month and since then I've seen every original series episode, the first seven movies, and the 2009 movie. I also now own a Mr. Spock t-shirt (seen in part in my profile pic), Red Shirt cologne (which actually smells awesome), and the bluray version of the 2009 movie. I also have Star Trek wallpaper on my computer, phone and PS3 and I'm reading a Star Trek novel on my Kindle. All in a little over a month... I also picked my middle name (which is getting legally changed the day after tomorrow) partially in honor of my favorite Star Trek character (only partially, to be fair). I haven't even started on Next Generation yet. I'm giving myself a little time to really savor the Original Series.
Oh-- I've got a bit of an obsessive personality, just fyi...