Indeed, as said above, much of it is the Acting and Story. Without a good Story or Actors, no matter how good technically you are, there will still be a lack of engagement with the audience.
BUT. If you end up Editing, Your job is 'Making the Star'. And thanks to that post above, I was reminded of a DVD that... might be useful and interesting (or it might not) which I highly recommend.
The Cutting Edge.
It's not a technical guide, but I believe any editor (and really, Director) should know and understand the history of editing and the many different styles of editing. The DVD explains the progression and development of film cutting to the modern film editing through interviews with many top Directors and Editors. Without a doubt, there is a sense of them flaunting their ability and the Directors flaunting their Editor's ability. But to be honest, they didn't get to where they are without their professional ability. To see into their brain how and what they think is a very beneficial thing!
That said, I did learn a lot from the talks of different styles. Afterall, Editing isn't just a technical job, it's an art, it's a philosophy. Expand your reading and viewing to more than a technical guide, but also interviews (and not just blockbusters!). There's a lot of juicy material and ideas to be found that way.
Oh, and if you really want to spend on something really amazing :
Visions of Light
They're both great DVDs, but I'd start with the first one as it's much Cheaper.