On my first TV shoot, as a young account exec (with hair!)I was told that my job was to keep the client the client away from the director at all costs. Any queries absolutely had to go through the producer. It said a fair bit about highly strung directors as far as I was concerned, but there you go. So a casting session yesterday, where you could you talk to him direct AND make suggestions was a bit of a surprise. I think it's important to have some influence if you can though, if you're the kind of planner that thinks tone, manner and all that is important.