Drummond/Zeller would be a downer for me too. A guy who's close to his ceiling and I guy who will likely never even come close to his.
At any point in the draft he's fool's gold. There aren't many things I'm sure about with the players in this draft, but I'm 99% sure that this kid is going suck -- the last times I felt this strongly was about Jimmer and Morrison.
You're not comparing Rivers to Kobe Bryant, yet you used Kobe Bryant as a comparison in terms of "killer instinct" in your post. I merely pointed out that Bayless also has a "killer instinct". No idea how Jimmer gets included, since I didn't mention him.