5 months ago:
really it all comes down to bad writing and the inability to balance the romance into the other storylines. even if a couples loved if theyre screwed with too much and lose sense some of the biggets fans turn off. chemistry is important, but sometimes that chemistry can be used to enhance the show in other ways, like a wicked friendship, but chemistry alone is never reason enough for a couple to keep centre stage.
but millions of people wanted buffy to take a walk on the wild side with spike in the earlier seasons? way to ruin an awesome villian and an awesome super hero, and thats what it pretty much did.