While I wasn't 100% thrilled with exactly how it was done, I found the premise of the Pah Wraith arc very compelling and even in its own way believable. What happened is that - as genuinely happens - Dukat was given a choice of good or evil. He choose the Pah Wraiths - they didn't force him - and in choosing them, he knowingly chose the path of evil. I agree that the glowing red eyes were over the top but a lot of the rest of it was very compelling, I thought. That episode (can't remember the name) where he preached to his followers was fantastic - creepy, horrifying and yet rooted in reality. It alone was almost enough to make that arc worthwhile.
Oh, and may I add that I agree that some paragraph breaks would have done wonders for your post, Dal
? That wall o' text is particularly unreadable on my tablet, on which it looks almost as dense as the US tax code.