A leopard can't change its stripes.
(spoilers for Just Rewards)

I always get to thinking about metephysical stuff when characters return from the dead. The dead dead, in Spike's case. I was a bit alarmed when Spike started talking about knowing that he is not going "where the heroes go. It's the other place. Full of fire." in Just Rewards. BtVS and Ats always seem to skate around the Christian notion of heaven and hell, instead having heavenly dimensions or hell dimensions. Quite why crosses are symbolically meaningful in a universe which accepts the supernatural and mystical but denies Christianity is never explained but I'm digressing. There are a couple of ways of fitting this suggestion of a judgemental afterlife:

Just as Buffy's description of Heaven could be a description of the final moment of her life - the glorious light and sense of freedom and love - so Spike's Hell could be the final moment of his unlife. He describes a pit and the ground cracking beneath him, as well as fire and torment. The slight problem with this theory is that Spike also clearly remembers his second death, displayed in his sarcastic response to Wes's question, so it seems unlikely that he would not spot the similarities. Despite what Angel might say, Spike isn't completely stupid.

Kalima, my latte sister, came up with a smarter theory. The Hell Spike is describing is neither a judgemental metaphysical plane in the Christian sense nor the moment of his second death eternally extended but a physical place linked to the W&H building. Something beneath them which only the "nearly ghost" can sense. She's thinking some kind of Faustian deal is going on, which makes me wonder how Eve is going to come into play. Spike is already telling Angel that the W&H deal is too good to be true - is he going to be the only one to see what lies beneath the surface?

I have to admit to not being wild about Angel season 4. I had a whole theory about the parallel storylines of Buffy season 7 and Angel season 4 being a subtle metephor for international politics (a theory I will get around to writing up here at some point and which, btw, Fred's poster of the Dixie Chicks supports) but I overall felt a bit ground down by it all. The whole Skip-ex-machina stuff with four years of Angel storyline revealed as a plot to bring Jasmine into existence? Urgh. Messy. I know they were working around various backstage crises but I was bored with the continual bleak tone. And Conner. God that lad was dull. So far, I've loved season 5. Angel has rediscovered fun. And then thrown Spike in to give us lots of entertainment watching the two vampires' circling each other like cats.