I agree that sometimes it's actually hard to understand what they are saying because of the cumbersome way the NPCs talk, but I don't mind it. It's setting the atmosphere for me. About the dialoge being rude and insulting, it's not insulting the player, it's just rough talk in general. And I like it - it's not something you see much of in many of the popular MMOs, and it creates a more realistic feeling. Instead of "Please good Sir Knight, can you save the princess?" it's more like "Get your ass over 'ere and listen up: we need you to save the stubborn lass, who has run off again." It's entertaining.