I built my UI and customised it to fit with my requirements. Here is a quick summary of my design principles. I broke the UI into four distinct areas, and then looked to maximise the visible environment.
Functional: Unit frames, Buff displays and Action-bars.
Raid-specific: Damage meters, Raid frames, Boss timers and threat meters
Class-specific: dot timers, buff organization, Cool down timers
Aesthetic: Everything else fits in to this category. These are add-ons you can live without, custom panels, bag mods, tooltip frames, loot frames, chat etc
Following my original ideas, and adding a few more like toggles for meters and maps, this is my current UI. A full list of add-ons used is available here
Casting, with map and meters hidden
For those of you who like the look of my UI , heres a link to my UIpack.
All credit goes to the Addon Authors! I just put em in a pack. Thanks guys.







5 man Instance DPS
10 man Raid DPS
25m Raid Healing