Creative Opinions

I thought I would try something new for the blog. It's perpetually a work in progress and I'm always looking for new things to discuss.

I wanted to try and pose a question to all who read this and post the responses in a forum manner. You have the option of leaving a comment but I thought it better to have opinions emailed to me (here) and I can post them in an anonymous manner but format it somewhat.

Here's the trial question to you all:
In terms of client relationships (whether it is with an agency or a direct client), what do you feel are key factors or ingredients to a good partnership?