This might seem like a ridiculous question.. but I'm actually of the opinion that it's fairly ridiculous on the part of the game that I have to ask.
When I hit escape, I see options for in-game stuff.
How would I, from the menu that loads when you hit escape, get to the manu menu so I can logout and switch characters or something?
Currently the only way I've found of doing this is to hit escape. Then hold space. Then mouse over where I want to go and click.
This seems incredibly roundabout for such a critical function.