Dell 24" in the office at 1920 x 1200 and when on laptop 17" at 1600 x 1200. I wouldn't go back to regular work on less than 24" as the extra space is perfect for all the menus. I think at the distance I work from the screen (optimized to the focal length of my computer glasses) a 30" would give too much side to side wiplash.
Gerald Hoffman
“The simplification of anything is always sensational” GKC
Archicad 4.55 - 27-6000 USA
2019 MacBook Pro-macOS 15.0 (64GB w/ AMD Radeon Pro 5600M GPU)