Shade Smooth weird looking?
So, here's a quick question. Today I added a cylinder mesh and clicked on Shade Smooth and noticed that it looked really weird. I did a little research and noticed that the box for "auto smooth" in the Object Data Properties area was unchecked. I don't recall unchecking this box, but I must have because I've never seen a mesh look so strange when selecting Shade Smooth. It almost looked like some of my older polygonal modeling gone terribly wrong. After checking the "auto smooth" button everything look normal.
My question is 1) is the cylinder mesh supposed to look that strange when Shade Smooth is checked? 2) Should the auto smooth button be checked by default, and 3) what does the "angle" option mean?