So, Speed, just to make it easy:
I'm sorry. I gotta rant about Spike again. HOW can he be anything but an NF?? Again, I keep thinking you haven't watched past season 3. As a human, he was a crybaby poet who thought this "effulgent" (lol) girl named Cecily was his one and only reason for living. In season 6, he's CONSTANTLY arguing with Buffy about love. He's always going on and on about love being this painful thing "that burns" and that if it doesn't, you're doing it wrong. Buffy responds with some stuff about love being safe and predictable, and Spike just about loses his mind. Even back in season 3 before the chip helps him tap back into more of his humanity, he's obsessed with the idea of SOUL MATES. Everything he does is for Dru. Dru eventually leaves him because her intuition tells her that Spike's true soul mate is actually BUFFY.
Just because he's a smooth talker with gelled hair, doesn't mean he's a Promoter lulz.
Edit: holy crap! I forgot the most OBVIOUS example!
Spike is the only damn vamp in history to actually go get his soul back, the hard way, and because he wanted to!!!
Who but an NF? an extreme NF at that. He was literally trying to put the SOUL back in soulmate with that one. He has wonderful peer-into-your-soul monologues throughout the series, even when "evil." (I don't think he ever really is.) There are several episodes where he has even just one liners which seem to peer into the souls of the main characters and throw the truth in their faces. I can't remember the lines anymore, but I remember this happening in the episode where he's wearing Xander's ugly shirt and Willow and Xander are babysitting him because he keeps trying to kill himself. Kill himself- haha. typical 4's and their suicidal tendencies.
the 4 dominance for him (despite being the Romantic he obviously is) means that 99% of his 'observations' are relationship related. He rarely cares about anything else. Most of his "evil" schemes are just that - ways to end up around Buffy.
Another interesting note to support my hypoth, in season 3, when he comes back to try and force Willow to do a love spell for him to get Dru back, he watches Angel and Buffy give each other sad puppy looks and then delivers a truly great speech about love and how they will never ever be friends. He echoes this perspective practically verbatim years later, right before he goes off to win his soul back.
Another example of his 4-ness/NF-ness, remember the episode, in season 4 I think, where Spike emotionally manipulates the Scooby gang in an attempt to distance them from Buffy? Yeah, he's like a high school girl. And it's awesome. I don't think a true ESTP 7w8 could pull that off so beautifully. totally. And haha, in the episode I'm currently watching, Giles says something to Buffy about how Willow is coping so well after Oz leaving. And Buffys like yeah, she's doing great. And Spike says:
"What are you people blind? She's hangin on by a thread. Any ninny could see that."
No Spike, only an NF.
One more thing: his ongoing obsession and attachment to the old NBC show, Passions. hahahahahah. I can't even FATHOM my ISTP husband watching that. He'd rather stick his head in the oven. He's ALWAYS hurt, when he's in love with Dru, when he's in love with Buffy, when he's not in love with Buffy. He's also very emotionally expressive, a wild child, a crazy punk guy. He is able to be cruel, but not because of power issues or ambition. His cruelty is always based on emotions: hatred, revenge for being hurt or the most important thing: for fun! In the episode when Drusilla breaks up with him, he explains to Scooby Gang every now and then how killing people is fun. His memories about killing with Drusilla are romantic and nostalgic He's not a cold-hearted villain, he's really a punk who loves great fun and because he's a vampire, he doesn't have certain social limitations like not killing people.
Compare to Angelus: he kills others to make Buffy suffer because she's his enemy. Spike doesn't rationalize his killing and he doesn't do it to make others feel something, it's all about him and his entertainment. If he's not killing for protection, he's hurting people as in a game with very extended rules. He loves a good game and therefore the slayer competition thing.
Courtesy of a bunch of posters, including myself.
Can you actually respond to any of these strong pieces of evidence, without blanket statements and HIGHLY general adjectives that superficially attach themselves to the type you think he is?