I haven't seen much of her, so I'd have to say that Punch-Drunk Love is my favorite. I'll check out Breaking the Waves sometime. Happy birthday, though.
1. Helena Bonham Carter
2. Rachel Weisz
3. Zooey Deschanel
BQ2: Honestly, I can't think of any endings that I flat out hated. I will say that I didn't much enjoy the ending to the more recent King Kong, though. I know that the original film ended in the same "Twas beauty killed the beast" line (or whatever it was), but I thought that it could have ended a little better. The final tower scene was pretty cool, but just the ending itself wasn't great to me.
EDIT: Forgot about War of the Worlds (The Cruise one). I disliked that ending more than that of King Kong.
BQ3: Prometheus. I love the LOTR and Dark Knight franchises, but Prometheus has the most potential to me, and I'll always be an Alien fan above the rest. I don't know much about the Avengers, but what I've heard sounds cool. I have absolutely no idea what the Hunger Games is about, but I keep hearing about the books...