The two main actors did the best with what they were given, but what they were given was a poor mixture of ingredients, not very well blended together. There were some extremely funny bits in this movie, but it was more like a bunch of biblically themed skits just run together. Plus, when you have a scene of one of your main characters literally eating poo off of the ground and another peeing in his own face, you had better have some extraordinary material to back it up, and this movie just didn't.
The movie was okay, but if you have read the book (and who out there hasn't by now?) then you will find yourself at times confused and frustrated. Some of the "small" changes they made due to time constraints were odd. Bella and Edward definitely looked their parts, even if the development of their relationship, got considerably shortened in the movie. Charlie was great, too. My prize winner for the best part of the movie, however, goes to Taylor Lautner. He was not on screen much, but he did an awesome job as Jacob. (And no, I was not a member of Team Jacob, folks) Can't wait for the next movie to see what he does with more screen time!
I was not quite as familiar with the whole Iron Man story as I was with Spiderman, Batman, Superman, etc. I was a little nervous at first because of that, but the second that Robert Downey Jr. appears on screen, you just can't tear your eyes away. He is an excellent actor, but you really feel that the Tony Stark character is so much a part of his own personality that they are nearly inseparable. Origin stories are always great, but the addition of a whole cast of first class supporting characters make this a movie that you absolutely shouldn't miss!