First of all I like how all apps, even the 3rd party ones, look alike. When using a new app I don’t have to learn the new UI. Most of the things are in the same place and I can almost intuitively click trough the UI. Also macOS feels smoother - I don’t know how to describe it, it just works out of the box and I don’t need to adjust the settings. The only thing I was updating was the touchpad scroll direction. Everything else had default settings set to my preferences. I liked the animations, placement of various elements and the fact I didn’t have to look how things work. It was as easy as it was designed to be for 5 year olds.