About 60" for the living room, but I try to prioritize image quality over size since I can adjust the distance. Since I have young kids, I have to keep the screen higher and farther than I like, though.
Otherwise, that's it. I use computer monitors if I'm in any other room, and those are ultrawide 30" I think. (And although it's not the question, ISP panels are my favorite even with OLEDs taking over the world. I just like their color profile.)
And kitchen? C'mon. Get a tablet like a normal digital junky.
Most recent one I got was a phishing scam for Trump accounts for kids (the $1k you can get if your kid was born in a Trump year). This really is a shit timeline.