Really is an awesome movie, but I don't quite dig it as much as I think I should (which sounds weird). Something about it falls flat, and it might be the fact that ALL the monsters gang-bang Ghidorah to death at the end. That's not a battle, that's a Rodney King beating.
Still, like others have said, this is an incredibly iconic movie, stuffed to the brim with monsters, and just a total blast.
BONUS: The DVD of this is the first Godzilla film I ever owned.