Accentuated the negative?

When the only invented 'ships in my first ten years' online fanfiction were happy, successful threesomes (Riker/Troi/Worf, Archer/T'Pol/Tucker), why do I feel so adamantly Buffy belongs with Angel and not Spike that the idea of a threesome there hasn't even occurred to me till three years later? The oversaturation of B/S on alt.tv.buffy-v-slayer.creative, which drove me away from the newsgroup for a year around season five, surely isn't as powerful an influence as having imprinted on The Once and Future King when I was sixteen, is it?