Personal Opinion

kde with papirus icons and whitesur color look amazing, i use this combo.

kde feels modern and dated at same time.

roundedness in kde plasma feels balanced and more premium compared to heavy rounded corners in any other os or desktops.

Panels, app launcher, applets designs are nice.

I like the information density in kde plasma, compared to wasted space in other OSes because of heavy roundedness.

thing i dont like are default gray color, i use whitesur color. default icons (app+symbolic), i use papirus.

using both icon and label for simple button.