I have my preview parameters set higher than normal to get a denser mesh. Depending on the source material that will give me anything between 200k and 800k tris.
That way I quickly get a mostly smooth surface that will look nice after decimating down to something between 8k and 60k vertices.
Which is all that will reliably work for something like Second Life and it is quite often more than decent enough for 3d printing. Sketchfab is also much happier when you upload “smaller” or less complex meshes 
Higher reconstruction quality also tends to introduce a lot more surface noise with some of the source material I have (frames extracted from 1080p and 4k video).