Ooh, this is something I actually know a little bit about
When I first started writing fanfic, I used an omniscient POV -- I'd shift from one character's head to another every paragraph. But discussions like these enlightened me
and now I stick with one POV per scene. I tend to get into a rhythm, a scene from Lois's POV, then one from Clark's, then back. I *always* notice POV these days, it's just one of the things I'm sensitive to.
When a scene's not working for me, one of the first things I ask myself about is POV -- am I trying to write this scene from the wrong side? I can't say how many times I've switched heads, and had the scene start to flow.
I can't verbalize how I choose a POV; it's just got to feel right. But one of the things I think about is, who has information that won't be in dialog? Is there anything I want the reader to know -- or is there something I want to conceal, or have misunderstood?
It's fun
PJ