This is what I have learned: I love to work. I love to be efficient, and creative, and innovtive. But, I always wear myself out when I come in too hot, and then my employer is disappointed that that amazing level of high performance I am capable of is not sustainable for 100% of the time.
It's hard to balance, but at the age and this stage in life I'm finally beginning to understand that slow and steady wins the race. No wonder I dislike rabbits so much.