It’s also a personal preference thing beyond the brewing temp. Would you like your coffee more toward floral and fruity, or more towards the chocolaty, smoky, and nutty? No wrong answers. I used to make exclusively dark roasts, but mix it up a little. I still generally prefer dark roasts or medium dark roasts. My current beans were labeled “medium-dark” roast which I generally like but I think might have been mislabeled. Seems light-medium to me, so I cranked up the temp and steep time.