Alright, this is certainly going to get a lot of flames and whatnot, but...
Here's a screenshot of my UI:
(Click on the image for larger version.)
And here's an annotated version:
(Click on the image for larger version.)
Visible addons:
BigWigs
Chinchilla Minimap
ChocolateBar
Dominos
Elkano's BuffBars
Grid
NeedToKnow
Omen
oRA2
Quartz
Recount
Shadowed Unit Frames
Other addons:
!Swatter
Aperture
Broker_Currency
Broker_Durability
Broker_MicroMenu
Broker_uClock
Chatter
LoggerHead
OmniCC
Pawn
Postal
PS. This screenshot is actually slightly outdated, I've since made the unitframes slightly smaller and reduced the debuffs to 3 rows.