Jumping on the recent bandwagon that is using Hal's textures. That, and the colors to the point that I could mimic them to the best of my ability.
Pretty much RDX6 for the unitframes/raid frames/cast bar; coolDown for the cooldown bars and buffalo2 for my buffs.
To combat the minimalist nature of my raid frames, I have borders highlight based on certain criteria: green for poison, blue for magic, purple for disease, orange for unstable affliction and red for aggro - red being the lowest priority and orange being the highest.