Gear Acquisition Syndrome (GAS) or Compulsive Tool Acquisition Syndrome (CTAS) has been defined as "the all-consuming desire to expand your collection of gear"
I fear that I might have this in relation to my photography equipment. I have more than enough gear, (in particular lenses) but I am always on the look out for new (better) stuff.
A number of year ago I saw this lensbaby 60 lens that gives this really cool swirly bokeh (as seen above). I have pulled it out a couple of time and was unable to get the right effect. There has to be some patterns in the background to show the swirl. I think I got a couple of them today.