Small preview of my shaman UI. I haven’t bothered rebuilding a custom one since Lich King was released and have been relying more or less on the default UI for most things.

The mods you can see active are as follows:
Grid
YATA (my totem mod)
Class timers
simpleMinimap
Eavesdrop
omen
fubar (with plugins such as itemrack, goldfu, highscorefu, durabilityfu etc)
arcHUD
And last but not least, my unit frames are agUnitFrames. I have my focus active for example purposes.
The mods you can’t see, but I also rely on include the following:
Quartz (cast bar)
click2cast
DBM and Bigwigs for raid encounters
recount
powerauras
I’ll update this as my UI expands and grows and I finally get around to building a sexy one.
~Q