recently i have been thinking a lot about how i'm driven more than most, to the point of being sub-manic.
on the upside:

• increased physical and mental activity and energy
• heightened mood, optimism and self-confidence
• decreased need for sleep without experiencing fatigue

on the downside:

• little patience
  
• transient interests
• transient acquaintances

the jury (me :) is still out on whether this is good or bad, it really depends on the particular circumstances. i have found that these character traits make me more difficult to handle for others, and conversely, i rip through new acquaintances at a quick pace, and often drop them after a few months.