Sort of new to UI design. From intuition it seems that the top-left corner is the "most important" or easiest seen part of the screen and the lower-right is the "least important" or last seen part of the screen. (correct me if I'm wrong). But what about upper-right and lower left? To which corners would you assign higher importance?
Readers of web pages follow an F pattern when scanning a webpage. Mostly we are conditioned into thinking where a particular UI element would be. For example, a Sign In/ Sign Up link should be in the upper right corner, rather than lower left, based on where I expect it to be.
UI designers do well to differentiate themselves through doing the unexpected, just not in this way.