Since I've been fiddling with my UI (again), I figured I'd show the latest incarnation. First off, Lyll's disc setup in a 5 man....
Shadowed Unit Frames (for my frame, target frame, and focus only)
GupPet (yay pet and mount)
Chatter (chat box mod)
Decursive (those grey squares above the chat)
Chocolate Bar (and assorted plug-ins)
Satrina Buff Frames
DoTimer (trying this as a replacement for Forte, and so far I like it)
and in the middle is Vuhdo.
Here's the same setup in a raid as holy... You can see BigWigs in here too
And then we have it on leveling alts, first a DK...
So far I'm pretty happy with this UI, and its' ease of setup across different toons. Only things I really need to customize per toon are the Power Auras (if I bother), Vuhdo, and any sort of special resource (runes, soul shards, holy power sort of thing).