Edit; I remade the picture to thumbnails so you can get a fullsize when you click them
Here is my ui. It is a moded version of the classic ui focused on pvp but works just as good in pve.
Idle with chat bubble
Idle with target, using unit frame with class colors but still keeping that classic look.
When important cooldowns or crowdcontrol abiltys are used they will show up and replacing the potrait on the unit frames.
Using Defuse font as combat text
It shows a castbar above hostile players head, even if you dont have them as your current target.