I thought the movie rocked! "Graaaaah!" is enough dialog for me. A person shouldn't have a Naruto length conversation while they are fighting. The Spartans were a culture of jocks. They trained their entire lives for war. All they did was train, workout, and tell stories about battles. They were not known for moving speeches, unless they were telling people to move. They were known however for being strong, fast and very very capable warriors. Spartans practically invented the concept of gym training.
In reality they trained their entire lives to crush slave revolts. Lokonia had one of the highest concentrations of slaves in the ancient world. I am not sure as to the exact figure off the top of my head, but it was over 100 to one. Spartan society was based around slave control, hence their concentration on military prowess.
I only know this because I have a degree in Classical and Near Eastern Archeology (Along with two other useless degrees). XD