What do you look for in making your UI?

Description : What do you look for in making your UI? For wow 2.4, wow 3.0 3.2 3.3 .World of Warcraft Guides and Raid Strategies, worlWOW MODS,WOW MODS Download,WOW Mods ADDONS,WOW Mods Bots,WOW Mods Hacks,WOW Mods UII was just curious of what you all look for in making your UI's. Like More space to see the screen, etc.

I've been fiddling around with my UI and have a pretty solid one and have tested others.