I've been there for over a week. Here's why:
What I had originally planned involved a lot of violence. A lot. To be perfectly honest, I'm not great with the writing blood and gore and doing horrible things to my characters. I've rewritten this chapter three times now, and it still doesn't feel right.
Then I realized why.
1) My villain didn't have any motivation for being a villain. Um, oops. This is a big no, no. Villains have to have a reason. The best villain advice I've ever been given is "Villains are the heroes of their own stories."
I put the writing on hold until I got the motivation figured out. It took me a while, and there are still a lot of wrinkles that need to be ironed out, but I got the over-all big picture. Just by doing that one thing, a whole new aspect of my villain's personality came out. Zomg, he actually started to feel like a person in my head.
2) Unnecessary violence isn't a good thing. When my villain was just a villain because I needed one, without drive or direction, the violence worked. It was some of the hardest stuff I'd ever written, but it was good. It also didn't work. At. All. There wasn't any reason behind it, except to make my bad good look really bad, and that's not good enough.
3) The end doesn't justify the means. Now that my villain had fresh motivation, violence--enough a little dose of it--just didn't fit right. Why on earth would the villain start with violence when persuasion could get him what he wants just as easily, and without the mess. There will be plenty of coercing violence later, but it should be later, not right up front.
All this taught me that I need to pay more attention to all my villains. You can't stick them in the book just because you need the additional conflict. If you do that, I can almost guarantee headaches and heartaches will abound.
Remember: Villains are people too, and like all people, they have thoughts, feelings, and something that drives them. If they don't, then they're just a crutch for your plot to lean on, and not a very sturdy one at that.