I've only read the first book of Twilight but I didn't like it - it just wasn't that interesting. Most of the characters lacked dimension and the grammatical errors were distracting, aside from all the plotholes. Unless I was missing something, I thought it was pretty awful.
I also saw the whole "Alex reads Twilight" thing on Youtube - kinda sums everything about the book up really.
From what I've heard about the film, many people like it because "The people in it are fit." I don't think much more needs to be said.
To Kill a Mockingbird was a good book. We studied it for our English Lit exam and I thought it was excellent. Plus, it's also one of thoe books you can read over and over again very easily - I probably felt this way because we had to study it in depth though