I use a cheap ESR case I got off Amazon for my 2018 iPad Pro 11". While I use my iPhones naked (and are doing so with my 12 Pro), I prefer a slim case on my iPad given:
1) I like ability to keep Apple Pencil 2 more securely attached than just magnetically. I like this one as it has a separate loop to help keep it securely on end of iPad, even when throwing in a bag
2) Ability to have it stand at a few angles
3) Given how much I'm often reading for long periods of time, I like that the case keeps my hands from sweating / smudging on the actual back of the iPad
1) I like ability to keep Apple Pencil 2 more securely attached than just magnetically. I like this one as it has a separate loop to help keep it securely on end of iPad, even when throwing in a bag
2) Ability to have it stand at a few angles
3) Given how much I'm often reading for long periods of time, I like that the case keeps my hands from sweating / smudging on the actual back of the iPad