Seems very much personal taste, that spans a wide range these days.

On suggestions from YouTube I tried 20+g coarse with low volume and temperature based on competition winning recipes and hated it. No body, thin and unsatisfying.

So I'm back to 12-15g medium, inverted, add some 90-95C water and stir out the fizz, then up to 180g water or so. Heavy repeated agitation early on, after maybe 60s uninvert for a gentle plunge. Usually dilute a little with some cold, drink black.

I checked the brew temp and full boil gives 96C in the press. I often do 200F 93C on the kettle for about 90 in the press. Sometimes I just boil and add a splash of cold.

My beans are medium roast - city+, no oiliness. I like pretty trad rich coffee and hate thin acidic tea like brews. Tea makes better tea than coffee does IMO. But I also hate acrid flat bitterness of dark roasts.