CHEWIE is still having fun!
I do understand why at times it can be the exact opposite though. I think a lot of it depends on one's collecting habits... whether one is an opener, MOMC collector, completist, etc.
My salvation is that I am a non-completist opener who customizes all the time. My favorite thing to do lately after work is to get out my boxes of custom fodder and customize away while I watch the St. Louis Cardinals whip someone's tail and have my wife make me dinner. Can it get much better than that?
Also, the VOTC figures have totally sparked my interest in Star Wars more than anything Hasbro has put out so far. These figures are what I have been begging for since 1995. I am also keeping a carded set, which is a first for me. The nostalgia factor kicked in on me for the cards, which is the first time I've wanted to keep ANYTHING carded. But of course this has meant getting many more to open for dioramas/customizing/etc.
Maybe what you need to do is just step back, take a deep breath and consider what it is about your collection that makes you truly happy. Is it having one of everything; is it having everything mint on card; is it the finacial value of your collection; or is it because you have a unique collection that is displayed to your liking? Also, if you haven't done it before (even if you are not an opener), try customizing something. It opens a whole new limitless world into collecting. Start off simple with a basic boil-pop head swap and then take it from there.
My point is, try to look at yourself and see why you collect, and what it is about the collecting that makes you the most happy. From day one for me, it has been making dioramas to re-create movie scenes. For you it may be something similar, or something entirely different. The same thing happened to me in 1999 when the Episode One toys turned me off a bit. I got into customizing then, and from then on, it has always kept me interested in the line.
Good luck, and I'm sure you'll find some way to snap out of it!