Also, in relation to Spuffy and Spike seeking out his soul because he loved Buffy, some fans see this as something horribly selfish and not positive at all. But didn't Willow try restoring Angel's soul in season 2 because she understood and respected how much Buffy loved Angel? And isn't it her love for Dawn that prompted Buffy to protect Dawn and even sacrifice herself for her, despite it being the more rational thing to just simply off the little brat? Just because these characters have a conscience, doesn't mean love can't be a powerful motivator - in fact, it should. And for a character WITHOUT a conscience, love is the only way to go.
I'd say this is something that irks some about Spike not because of the singular action alone but because of how it plays into the whole of his character development and current persona. Which is why one views it differently when someone like Willow, Angel, Buffy whomever does a similar thing because you're judging them based on a different background and current persona. Thus it's hard to compare one to the other because they don't start out from the same place.
It comes down to individual judgement due to circumstances and percieved motivations. (and clearly we see those motivations differently)
Taaroko
*tips invisible hat to you*