1.) Because of Angelina Jolie, whom I think is the only excellent female actor for the role. Let's take a look why she's paid high to do this.
2.) Not another Matrix rip-off, it's something to deafen your ears and knob those eyes off. The trailer looks cool though, so as the plot I think.
3.) Because their bullets don't fly straight
4.) The word "assassin" just thrills me, and I love it.
5.) I just want to watch it. LOL