Cult classic. Just like Verhoeven's Showgirls, this one never attempts to take the subject matter seriously. And anyone who watches Starship Troopers, should keep that in mind.
Wooden acting and stiff line delivery is, in fact, just what the director required from his actors. The powershots of soldiers with their phallic guns and one-liners is comic-book writing at its best. Action sequences are extravagant, over the top and chaotic. The paper-thin chracters are simply cannon fodder, just like they should be. Oddly enough, for a ten year-old movie the special effects are not really half bad and suit the overall look and feel.
Not to be taken too seriously, but there is an underlying theme of governmental oppression and the worry about the big brother watching. How do you validate yourself as a human being, after all the things you have done to the society, environment and your lifestyle in general? What happens when your dreadful existence is at stake by an outside threat? In the end, it is still your misery, you've grown to like it with its faults and all -- and you defend it.
Just like you do this movie.