Just re-watched the film. It's got to be one of my all-time favorite movies. It's a great comedy, has amazing effects, and can even be a bit somber. Especially at the end, in the credits as you watch as we destroy ourselves over the Helium 3 on the moon.
Reminds me of stuff like Pluto Nash or the Fifth Element.
Can't really comprehend why it apparently got mostly negative reviews by critics. Perhaps "Head-up-ass" syndrome.