I worry about pacing in my story, mostly because of what I want to include VS. what I think the readers want. Like @CurlyComics said, I like to include development, and the most obvious way to develop your story is to have dialogue. However, those moments always threaten to slam the brakes on the pacing. Each "page" of my series don't have an abundance of panels, and I only update once a week. I worry that such slow pacing would bore out my readers.
This is where I tell you to condense everything and pack as much as you can into every scene. Story critics, especially film critics, love this stuff.
They'll tell you that every good action scene is not only thrilling, but fueled by the context of the conflict and the attitudes of your characters. That way, said action scene will serve to develop your character and their approach to the situation you've placed them in.
With dialogue, they argue about "good writing"; what they mean by that is, "make it succinct". On top of that, facial expressions and speech patterns would go a long way towards building a believable character.
This is just a personal add-on:
I'm inclined to agree with all of these points, but storytelling is such a fluid art, I find it difficult to find any "universal" theories for it. People want consistent pacing, but I personally see potential in manipulating the pacing between slow and fast.
Say, a roller coaster: You tend to have a slow build-up point, where you're climbing up to the peak and start speeding down. Depending on the coaster, it'll do this multiple times. A slow-paced build-up period can enhance the story experience when the time comes for that climactic, fast-paced race towards the next scene.
Also pacing is something people feel, I suppose; it attributes to something like a smooth, consistent ride on a road. You can turn people's expectations on their heads with a purposefully disruptive brake on the pacing. It'll wake them up and pay attention to what you have to say.
People like well-written dialogue too, but there is a power in silence. People can speak out their feelings, and that's conventional and expected. Silence, if done right, can speak ten times more words and convey your character's inner thoughts in ways that regular speech can never hope to convey.
I hope SOMEONE finds all this useful, because I just spent 30 minutes of my life typing this out. Gonna go eat something now.