I've been mulling over this on my way to and from work and I have 3 contenders:
"She came from Greece - she had a thirst for knowledge" (Pulp). It's so intriguing - you immediately want to know more about her.
Then "Wake up, Maggie - I think I've got something to say to you". I love the hesitancy - he knows he should end things but he doesn't really want to. You can picture him mulling things over while she's asleep next to him.
And then there's "Now that you're out of my life I'm so much better." (Survivor). It's so emphatic, such a clear, confident statement. There's no hand-wringing nonsense - Beyonce is just stating a fact. As a way to open a song it's pretty damn good.
What have I forgotten? What's better?