It's hard to remember which hat you're wearing sometimes when you run a session. Some engineers are frustrated musicians or producers. You hafta walk a thin line. Does the group want your suggestions? Do you get pissed off if they don't listen to your ideas (or turn them down)? Sometimes a group will come in and they want help - others have a pretty clear idea of what they want. I try to always remember that they're the people footing the bill, but if I hear a problem, I'll quietly point it out and offer some alternatives. If they don't agree, that's fine, and we move on. Leaving your ego behind when you're tracking is a good idea - they don't need another member in their band, unless they ask for your help. I try to make it clear before we lay down the first track that I'll make suggestions, but only if they want suggestions! It's their album, with their name on it. Here in North Texas, some of the studios have a real attitude problem, with engineers rushing out of the control room to yell at band members for playing too loud, or making mistakes - like it's his session and he's paying for it. A few studios have a reputation for making band members feel really uncomfortable. Maybe some of these engineers need a small sign right on the board that says, "This is NOT your band!", or a sign that says, "If you ain't paying for it, SHADDUP!"