GlassJaw
Hero
I pretty much always use a screen, especially to hide die rolls. Keeping my rolls a secret from the players a powerful DM too IMO. I don't want the players to know anything unless I want them to. I like the separation between the players and the DM. It's much easier to evoke fear of the unknown in the players when you have a screen.
I stand up a lot when I DM so I don't feel the screen gets in the way.
I stand up a lot when I DM so I don't feel the screen gets in the way.