My UI

This will be about my UI, and why I like it. These are links, because images inserted in here get cropped instead of shrunk and look stupid. Also, I play on a roughly 15" screen, so it's probably smaller than many people's, which means I don't have quite as much room as I would like to play around in. These screenshots are also shrunk down a bit, but you can get the idea. Lastly, I left myself as focus in all of these, which is why my name is in the bar below the player frame.

In Dal, with a target
Showing raid frames in config mode (they look better in a real raid)
In combat against a target dummy

Here is a list of mods I use, with a focus on those visible in the screenshots, and a brief explanation for the more obscure ones:
Pitbull unit frames and raid frames (I use Vuhdo to heal)
Bartender4 (with ButtonFacade for button skins, Elegance Dark in this case)
Chatter
DeadlyBossMods
Fontain - allows you to change basically every font in the game - I use Accidental Presidency for almost everything
MikScrollingBattleText
OmniCC - adds text to show the cooldowns on items/abilities. Very helpful.
PallyPower - really handy buffing tool
Power Auras Classic - The SoC icon to my toon's right as well as the two yellow icon's to my toon's left are from this. Allows you to show images based on basically any conditions you want. Very customizable, I stick with pretty basic stuff.
Quartz
Retribution FCFS Helper (clcret) - Awesome addon that shows you what ability to use next based on the priority list you set up. Also can watch ICDs for you and other things. Very cool.
SatrinaBuffFrame - I have 2 special frames for this, in addition to the normal buff/debuff. One is my debuffs, above my player frame (easier to see) and the other is my target's buffs, above their frame (more customizable position than the auras in Pitbull)
SexyMap
Skada - Damage and threat meter. Shows damage out of combat, threat in combat.
TidyPlates (using Cleanplates theme) - Really nice little nameplates, apparently much more lightweight than Aloft.
Time to Die - A simple addon that simply puts a little text box approximating how long your target will take to die based on some algorithm. Not incredibly accurate, but good for getting a general idea.
Tipsy - Lets you move the tooltip location. Not any of that fancy DogTag stuff.
Viewporter - That black bar at the bottom. This causes WoW to render the screen as if that black part wasn't there. In essence, gives a place to put addons where they can't block anything and gives you a wider view.

Okay, so now to talk briefly about my setup. First off, I like symmetry. My player/focus/focus' target frames are set up to mirror my target/target's target/target's target's target frames exactly. They are all close to my toon, but provide space to see fire. The auras from Power Auras are even closer, but they aren't solid, so they don't block much. The clcret frame in between player and target lets me keep an eye on what button to mash without moving my eyes too much (I also have a back-up bar with all six of my main abilities for certain situations, like Maly discs). My bars are set up in a way that is nice looking to me and provides separation between sections. Skada appears next to the map, but it doesn't show when I am solo. My chat windows are separated, the left one is things I pay more attention to, the right one is things like General and Trade. DBM bars appear in the top left corner, and move to the middle, above my toon, when they are close to expiring. Pallypower is up in the top right corner.

Basically, I think that this setup provides good visibility of the area around my character while still giving me quick access to unit frames, buff info, etc. I am still not totally sure about the stacked frames, but it's working for now. Oh, and having the player name displayed is pointless (that never changes, after all) but I do it for the symmetry. Sorry.