Oh, how I loathe writing scenes containing more than two characters! The last one I finished had four, and the one I'm working on now has five. Five.
Why is it so hard for me to do this? It's like, I'll be feeling okay with the flow and then re-read and realize that one character has just disappeared from the scene! Then I have to go back and work them in. Then I'll realize that the appropriate people haven't reacted to certain dialogue (or whatever) and I have to figure out what to do about that.
I'd love to cut two characters out of it because I find writing three more manageable, but to avoid an extra scene-break and keep it smooth, they all need to be there. They each add something, even if for one of them it's just realism.
This a five-page scene and I've been working on it for two days! Will the torture EVER END?
(And no, I can't just come back to it. It will take me just as long to do it later, so I might as well push through it now.)