It wasn't even a particularly good movie.
It was, however, a fun movie. If you want mindless violence, lots of eye candy, and good looking guys wandering around in leather thongs...well, there y'are. I even mostly repressed my instinct to grouse about the liberties taken with the Battle of Thermoplyae, although I confess, I did find myself muttering, "I didn't know the Persians employed so many mutants."
Still, while Spartans may be badasses, the Persians were waaaay snappier dressers. If I'd been a Spartan, I'd've killed the Persian magi and taken their clothes.