Hate/love - when someone is so damned good that you hate him for being better than you even while you love what he does. It's an emotion common among creative types and athletes. I felt it for Neil Gaiman when he was writing The Sandman. And of course, I feel it for Joss Whedon.
Okay, so we all know Joss is awesome. But let's dissect this for a moment. Forget about him inventing two whole new kinds of dialogue (Buffyspeak and Firefly), or reintroducing gunpowder and horses to space opera. Let's go almost all the way back, to when Buffy was a mid-season replacement that was supposed to flicker and vanish; instead it grabbed hold of people's eyeballs and wouldn't let go. Why? Metaphor, metaphor, metaphor.