I think any movie that begins with a limo driver playing a rap Christmas song and that contains a corpse with HO HO HO written on it has to at least *contend* as a Christmas movie. I'd rather watch it than Love, Actually, anyway.

As far as story structure goes, like most action movies Die Hard's internal plot is revealed by its external plot. That is, we mostly learn about John's emotional landscape as he traverses the physical landscape of a slowly exploding skyscraper. At the beginning of the movie we know--and John kind of knows, although he hasn't figured out how to admit it yet--that he's been a jerk to his wife Holly, and that he's really in Los Angeles to try to find a way to apologize and reconcile to her. But he feels stupid about the whole thing, which is why he picks a fight with her the minute he sees her. So much for the setup of the internal structure.

BOOM! Hans Gruber and his troupe of German models show up, and the external structure begins. John now has to do something he finds a lot easier than just apologizing to his wife, which is survive the takeover of the skyscraper and pick off the terrorists one by one. At his lowest point in both plots--when he's picking glass out of his feet--he finally admits (though not to Holly!) that he needs to apologize to his wife. That's the turning point for both plots, too, though, because that's when his head finally clears enough that he figures out Hans's plan and can be one step ahead of him.

Hilariously, we're never actually shown John apologizing to Holly. We just kind of infer after the scene where he drops Hans off the building that he must have, because they're reconciled at the end. The external plot has been resolved, so probably the internal plot is resolved too, albeit without anybody making a monologue about it. But that's action movies, baby!