I like that my eyes usually have something to focus on with every wide frame. In the beginning, its a very still environment, so you're eyes are naturally drawn to any sense of movement. Rey rappels down the rope on the left side of the screen, which cuts to a wider shot of her rappelling in almost the same screen space. Your eyes don't have to re-adjust to find the focus in the next shot.
There's the one teaser from Saturday that smoothly moves hands off a one-shot of Poe to Finn, with Poe giving him a gesture of acceptance to this former Stormtrooper and the camera reflects that choice. We get to follow Poe a bit, then we see Finn, they connect, then its soley Finn. And all the while, there's the real sets and actors in the background, going about their business, giving a tangible weight to the world.
My favorite bit from the trailer was here, near the beginning. Once again, we have a still environment, our eyes track any sense of movement. We see a ship launching in the distance, can't quite make it out, its a bit mysterious to us. The wing in the foreground of this shot gives it a bit of depth, a sense of how far away it is. We then cut to Rey, the implication being she is watching this ship too, instantly connecting our reaction with her. As the camera slowly pushes in, her face subtly changes to a bit of melancholy and desire. A quiet evocation of Luke's similar lament to get off this boring desert rock, to be something greater, foreshadowing the adventure ahead of her. Its a very human desire, and those two shots connect us with her character motivations.