I had several companies where the PM were horrible, lost, and egotistical. I then ran into a company where the PM spent ten years as a developer for some popul

I had several companies where the PM were horrible, lost, and egotistical. I then ran into a company where the PM spent ten years as a developer for some popular game companies. That guy was worth his weight in gold. Development was so much smoother. I didn't have to spend time explaining why we couldn't do this or that. He'd nix bad ideas at higher levels before it even hit us. We were given ample warning on how we approach things ("Custom B will want this, and if box what you're doing now it'll be harder blah blah blah").