I'm surprised to see Continents win this poll--I guess it is the default but I really, really don't like Civ VI's Continents map. Every time I play (usually on Small, occasionally on Standard), I'm getting two big Continents that evenly split the Civs, often both stretching from pole to pole (and usually making circumnavigation impossible). Boring. Why can't I occasionally get three or four continents, or an isolated start, or horizontal continents, or a circumnavigable world?
I want Civ V's Small Continents map back.
I don't think Island Plates makes for good gameplay. Pangaea and Inland Sea do, although both come with an extremely high risk of AI Religious Victory. Fractal is probably the most fun by virtue of being the least predictable.