Is there a "right" way for wall outlets to face?

Should they be

| |
O

| |
O


or


O
| |

O
| |



and why?



The top way makes little faces and the ground pin is closer to the
ground, but it seems like the bottom way might be safer (something
metal would hit the ground pin first if it fell). Any other reasons to
prefer one way over the other? How about sideways (I won't attempt
ASCII art for sideways).

-Don
--
"Ladies and gentlemen take my advice.
Pull down your pants and slide on the ice."

-- Sidney Freedman