Width: 512 (normally would not adjust unless I flipped the height and width)
Height: 768 (Have done up to 1024, but 768 was my sweet spot)
Sampling Method: "Eular A" became pretty much the default as versions moved along, but "DPM++ SDE Karra" and "DPM++ 2M Karras" are favorites for me as well.
Sampling steps: 30-50 normally (30 being my starting point, but going up to 45 a lot of the time)
Hires.fix settings: Upscaler (R-ESRGAN 4x+, 4k-UltraSharp most of the time), Hires Steps (10), Denoising Str (0.34 - 0.45 normally), Upscale (1.5 or 2 does well)