http://i51.tinypic.com/1zxrxuh.jpg
I try to keep my interface pretty basic, it was a necessity running on my previous laptop for raiding.. Finally upgraded to a better one and now I have literally no time to play. The black abyss is an addon called Sunn which you can do all kinds of nice stuff with, very customizable and interesting if you want most of your interface off of your actual play screen. Other than that I have Bartender 4 running, Elkano's Buff Bars, prat 3.0, sexymap, Shadowed Unit frames (my player, pet, and target of target, focus frame, etc bars) and that is pretty much it as far as the interface goes, everything else is for personal reference and/or raid utility. In raid my interface looks alot less bland, grid fills up pretty much the entire area that is blank between my map and character's image. Very basic and you shouldn't have any problems but feel free to drop me a pm if you feel i can help you in any way
Half your screen is a black bar..