About 95% of the time I'm in a conversation my character model spins around so I can barely see her face. I have no camera issues and outside of conversations it all seems to be working fine. She doesn't stop speaking, I can see the side of her lips, sort of... It's really distracting and immersion breaking. I'm not sure what to do about it.

Hey I've had this problem too at first, tweaking the ini's and installing sweetfx from nexus mod manager (one of these or both) helped remove the problem.

http://www.nexusmods.com/fallout4/mods/40/?the graphics will get a bit better and doesn't affect FPS from what it seems a little mod that won't hurt.

https://steamcommunity.com/sharedfiles/filedetails/?id=551069501&tscn=1447077828 the .ini tweaks

I'd recommend changing the following : Mouse acceleration, FOV, FPS.

Thank you so much! I've played for about an hour and I've gone through a few conversations without trouble. I'll let you know if it acts up again.