They Just Fit
I didn’t write them to come together, they just fit. - Joss Whedon, on Buffy and Spike’s songs in “Once More With Feeling” (OMWF Commentary, BtVS Season 6 DVD set)
This moment on the commentary struck me especially strongly because it describes not only the relationship between Buffy and Spike in “OMWF”, but also their relationship in the entire show (taken from a meta-analysis standpoint). Some TV couples are made for each other, planned from the start. Destined. Whatever. Buffy and Spike most certainly were not; they found each other on their own.