Just a simple cube that's good for testing support settings. Plenty of overhangs and holes for testing whether supports are removable or one with the model. What I found worked for me and produced the greatest results was

40% support density zigzag with connect support zigzags enabled. I chose 40% as I liked how the supports tended to come off in whole pieces or unzipped as it was a zigzag pattern.

support x/y distance was 1mm support z distance was .2 for a layer height of .2 .16 for a layer height of .16 for the top .32 for a layer height of .16 for the bottom

I will likely add more support tests as I find the need, find problems with my current setup, or am asked for specific designs.