I got the wife an iPad Pro and an Apple Pencil for Christmas, since she's an artist, and artists need good tools. Sometimes she lets me use it for my silly art: diagrams.
I work in a text editor all day. I write lots of code, in lots of languages. Most everything I do is via a keyboard. But damn does it feel good to draw again. The tactile sensation of using a pencil to make marks on a page (even if that page is glassy and the pencil is smooth) is remarkable (ha!)
Having layers, millions of colors, tons of brushes and (most importantly) an undo button? Priceless.