Winter here means it is dark by half past four, so if I want portraits of the family it is flash or ISO 12800. I have one Godox speedlight (TT685, old one) and the A7 V, mostly with the 85 1.8.
What I tested so far:
Bounce off ceiling, which is white and about 2.6 m. Gives clean, even light but flat, and shadows under the eyes on my wife.
Bounce off the wall to the side and behind me. Better, more direction.
Then I bought a cheap 100 cm shoot-through umbrella on a stand, flash triggered from camera with an X2T. This is the most "portrait" looking, but the room becomes like a studio and the kids immediately stop being natural.
Question for people who do this more: for relaxed family pictures at home, which would you choose? And what power and distance do you use with the umbrella so the background does not go black? Happy to answer questions.