Giles: "Your predecessor was the Slayer for 12 minutes. She prevented the apocalypse. I dare you to do better. Enlist at the Watchers Academy"
Buffy: "Seriously, with the talking to me? Not exactly getting the why."
I'm just go ahead and say that this quote is the best one so far.
That said, I kind of just want them to remake Buffy using the Star Trek script, because all these quotes make entirely too much sense.