Do you know why she dislikes your collectibles? Have you tried understanding her feelings about the situation? If you haven't yet, and you go to the trouble of understanding her perspective and feelings, you may well desire to do as she asks anyway.
Also, looking at Texas Girl's advice, I'm reminded of the idea that a man isn't allowed to have anything that's his, that he greatly likes in his own home. x.x That, or it's consigned to some kind of "man cave" and the wife claims the rest of the house. I'm not saying that's the case here, or at Texas Girl's place, but that could be the dynamic that is being set up, and that's not a healthy dynamic.
If this is the case, I'd say that this sort of thing cuts both ways. If she has a collection that you don't like, then either she doesn't know this fact, or she's being hypocritical. In this case, you might try following Texas Girl's advice, but also adding that you should also sell off her non-edible, space-consuming anti-intrinsic collection at the same time, since she feels so strongly about getting rid of collections. Yes, if you have limited space and wind up tripping over them, this includes the "sacred" shoe collection.
If she doesn't have any collections, and cleans a lot of her stuff out into the trash/donation bins, then I'd say she's simply got a standard she likes to adhere to, and is attempting to do so. Far less problematic, and if it's a healthy standard for your living space and relationship in general, it should be encouraged (especially if she does the cleaning).
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Also, no. Star Wars is mainstream. The majority of Americans have seen Star Wars, and many have owned something or other star-wars at a time in their lives. Collecting Star Wars memorabilia is no more surprising than collecting sports junk, stamps, or books. Now if he had said something like a collection of Fredy Crugar masks, or a framed collection of Sci-Fi babe posters, or a collection of nose-hair trimmers, then I might have been surprised.
