One of the biggest differences between a senior system administrator and a junior system administrator lies in laziness.
Both are equally lazy, but the senior admin is not self-conscious and plans accordingly. The junior admin does not admit such things so to look strong, yet tasks are left undone or completed in haste.
Differences may also be seen in:
* Progression of hair loss.
* Progression of grey hair.
* Strong wishes of becoming amish.
*laugh*
If I only was better with horses…