Interviews are two-way conversations: a lot of what candidates do (or should be doing) is finding out about the team/company etc., since anything that research would show based on press releases, etc., is superficial. Questions like "What do you believe you can achieve with us personally or professionally that you can't anywhere else in the world?" make very little sense - even if I've read everything there is to read, I still know very little about your company, so there's no way I could answer a question like this.

This, however, is excellent advice: "It is amazing how many candidates won’t premeditate before diving into interview questions. Those who take the time to stop, think it through and have a few crystal clear points are amongst the best people I’ve ever worked with." I interview quite a bit at my current company, and it is amazing how few people stop to think before they answer questions.