Quitting Hasbro has seemed to be a common theme in the collecting community over the past two years. To me, Hasbro is what brought me into Star Wars collecting and it is still my main focus. I must admit, that I have breathed a sigh of relief of the loss of the Star Wars license by Master Replicas. While I love their products, it has just become a drain on my wallet. I also have a nearly complete Lego collection, which is also pretty pricey. My only other higher end focus is the Sideshow 12" line, which has seemed to have calmed down in the past few months. We only have a handful of figures still on preorder with nothing really on the horizon.
GG is of course another story, but it looks like they could be going down in flames due to their actions of the past year. I probably have about a dozen GG busts, mostly acquired from amazon.com sales and Galactic Rewards points from the former MBNA credit card.
Kubricks are something that I haven't dove into yet. I purchased the most recent wave from Jeff here on the boards. I think they are neat, but to collect the backlog would take some time and money, especially to go after the chase figures. I like the figures, but it is one of those things that are the back burner, like trying to finish off a loose vintage collection.
Ultimately, you should collect what makes you happy. I can understand the desire to sell off items that aren't displayed. I have had my 3 3/4" stuff sitting in boxes in my basement that I never got around to fully finishing. I have just had a two story garage built and have been moving everything to the second story in order to finally display my collection. All I need is to either purchase or build some display cabinets and I'll be good to go. Sadly, the 3 3/4" stuff will take a backseat to MR for display, but after all the MR stuff is unboxed I plan to display all my 3 3/4" figures again. At that point, I'll re-evaluate what I have. For the figures, I collect one loose and one carded so I plan on doing a figure wall for the carded stuff. I have also collected two of each for battlepacks, etc., but I may consider selling the boxed ones if I can't display them. I think the only undisplayed, boxed items I would keep, would be my Hasbro 12" collection.
So anyway, I say if you still enjoy the 3 3/4" stuff like I do, then keep it, give it some time and try to envision how you would feel if you sold it all, but then decided you wanted it back. Remember that a full wave of Kubricks will cost you about $80 which may or may not include the easy chase figures. The one per master case chases are usually around $100/each. On the plus side, they are easy to display and take up a lot less room, and there are a lot fewer figures available.