He is UNDOUBTEDLY BRAVE, but ARROGANT.
That's how I describe and see ACHILLES as a warrior.
Achilles is the son of Thetis and Peleus. Even before he was born, the fore-thinker warned Zeus that Thetis will bear a son greater than his father.
Among all the characters of Troy and Helen of Troy, I like Achilles the most!
He can hit his enemies with just one blow. Just like what he did in the first scene of the movie Troy. He kills mortals whenever and wherever. He is like a Lion, whose pride is dying because they dont have something to eat. He kills whoever person gets on his way.
A monster like Achilles also loves, though fear and death are connected to his name. Just like what happened before the famous battle of Hector and Achilles, the former killed the latter's cousin, Patroclus, knowing that he was Achilles because he wore his shield and armor. He grieved because he loves his cousin so much.
Another one is his love for Briseis, a Trojan, that when Troy was burning, he went everywhere just to find her.
Achilles' heel: is a term used to describe the only weakness of Achilles. His heel is his only weakness. Paris killed him using a bow and arrow through his heel.
When it comes to battle, NO ONE CAN BEAT THE MIGHTY GODLIKE ACHILLES.
http://en.wikipedia.org/wiki/Achilles
