Hah that's so funny you say that with no clue as to what it might be...what makes you think that?🙂
Ok Cougs, I'll go first.
I don't really have any guilty pleasures on which I chronically spend money (except pretty much my entire grocery list; I only buy foods that I like).
My consumerism hits me with large, one-time purchases. Like, my junior year of college, when I was broke as heck I spent $1300 on a sweet road bike.
When I finally decided to get a smart phone, after holding out forever, $199 for a blackberry storm (which sucked bizzalls compared to the droid incredible I have now), plus the data plan

Had some buyer's remorse after signing that contract.
I was pretty convinced I would never own a flat screen TV, because I don't watch much television at all. But I do love my movies. About a year-and-a-half ago I was out and about and saw a sweet 50 inch plasma for $700. SOLD.
I had a phase shortly after graduating college where buying decent clothes was a guilty pleasure. Didn't last long but all told probably cost be about $800 over the course of a year. Three Banana Republic suits, a bunch of dress-shirts and ties, cufflinks, a wool coat. I was young and foolish.
In college once I had a one-month run on cheap DVD's once...very guilty pleasure and now I own some terrible movies.
I'm pretty frugal most of the time, which makes it hard to pass up a good deal even if it's something I don't need at all. I also think that being cheap most of the time sort of wells up inside me and comes out in impulsive, yet cathartic spending sprees and large purchases.
What were we saying about tablet PCs?
