I find xperl to be very memory intensive, and moved away from it about 6 months ago. I much prefer pitbull / grid, even if it is a more complex set-up.

I recently used it to tell me when my focus target is affected by soul reaper so I can safeguard.

I use it for Shield slam (both snb procs and action usable), demo, tc, external cooldowns, my cooldowns (incl. duration remaining), and trinket procs (when dps’ing).

I like it so much because it means I don’t have to look at my buff bars, or my action bars. Everything is readily apparent and very clean with the proper selection of textures. (stacking textures are great).

I’m a UI nut, I’m constantly refining it (within the same basic set-up) to be cleaner and easier to read as well as less memory intensive.

The greatest part of my ui is the ability to see all critical info within my field of vision. Critical information is front and center without obscuring my view of the game world.

Oh and viewport mods are imba. I use sunn art. A horizontal viewport increases the rendered game area effectively allowing you to see more, greatly increasing your situational awareness.

I won’t list all my addons, because the list would be huge, but ones I feel particularly useful are:

Power Auras
Miks Scrolling battle text (with heavy customization)
Satrina’s buff frames
Grid (greatly decreases the space raid frames takes)
Bartender
Tidy Plates - Threat plates

I wish I could find a better hud then Ice-hud, it’s the best I’ve found, but it still takes up too much of my screen, even with only my info displayed. I do love being able to see my life and rage without resorting to glancing in the far corner (or bottom) of my screen.

AFAIK it stopped being developed a while ago but it still works for me.

The one thing I’m proud of the most in my UI is my hotbars and keybindings. I basically laid out my keys to look similar to an onscreen keyboard, complete with a number pad as well. So, almost every key on my keyboard has a corresponding hotkey onscreen; they are also labelled because the nature of the mod (Bartender, though I’m sure every bar mod has binding labels). It stems from my experience playing RTS games, and it makes access to skills that much quicker. I tend to place skills that I use more often closer to my movement keys on the left, and less often used skills closer to the right. Buffs, food, and other random things get placed on the number pad.
The biggest advantage to this is the connection I get between what I see on screen and what I can physically press on my keyboard. It helps with feel and things, as I integrate skill cooldowns on my hotbars as well. I also don’t waste time with Shift + #, Alt + #, or Ctrl + # (Shift + # ends up being raid marks), so one keystroke activates one skill. The only thing I don’t have the ability to do yet however, is more aesthetics than anything else; I’d like for it to really look like an onscreen keyboard, where it shows the function and toggle keys, as well as possibly highlight buttons as I’m pressing them. Otherwise, I’ve had no problems with my keybinds. It’s my one beauty in my otherwise cluttered and ugly UI.

And that’s one thing I’d like, is a way to make everything look cleaner, but I don’t care to spend time tweaking form over function. I have a screenshot of it somewhere, and if I can edit this post I will, or I can just double post, or I’ll email it to you, Vene.

PROBLEM: i wanted to see my health and the bosses health without looking in the corner.
PROBLEM: i wanted to have target of target be very, very easy to see.
PROBLEM: i wanted to be able to see at a glance who in the raid had agro on something.
SOLUTION: pitbull

PROBLEM: i wanted to organize my buffs into categories and highlight certain ones to jump out at me
SOLUTION: elkbuffbars

PROBLEM: i wanted to see reorganize my cast bars, and put some abilities in a more noticeable position to easily see cooldowns
SOLUTION: bartender

PROBLEM: i wanted to easily see my debuffs on the boss as depleting bars
PROBLEM: i wanted a better boss casting bar
SOLUTION: quartz

etc, etc. you really need to know what problems you’re trying to solve in order to get the UI that best fits you.

for instance, there are many SCT mods out there, and most people use them. i find scrolling combat text to be largely irrelevant and annoying, so i choose to turn it all off.

I have been working on it for roughly 3 years and have had it out for public download for quite some time. I do little tweaks here an there between releases, but overall it holds the same theme.

All the information is at the bottom leaving a wide open game field. Icehud allows me to remove the need for a player frame for myself and forces me to look up around my character.