Share 'user interface design and usability'

I've heard lots of people say virtual worlds that display lots of data or text don't work. But is this a fundamental flaw in virtual world navigation or just bad design of the interface. Who here has studied design that relates to this area ? Or things like usability or HCI (Human Computer Interaction) as one university in the UK termed it ? Do things like drop down menues at the top of the scr…