Here's a poll on culpability, folks. A run-down of what's the what is probably necessary before you dive into it, though.
#1-3 deal with instances where the character is ostensibly under some supernatural influence (Xander in The Pack, Willow in the Dark Willow episodes, and Spike under The First's trigger in S7). In each case, how culpable is each character for their offenses during the period in question? This sounds straightforward, but I predict some disagreement.
#4-5 deal with the souled-soulless distinction. How culpable is Angel for Angelus' crimes? What about souled!Spike and soulless!Spike?
Then the two #6's (I fail at numbering, apparently) deal with the nature of vampires. Are soulless vampires culpable for their own offenses or does their very nature mitigate their moral culpability?
Everything is on a scale. Comment and show your work.
Poll