[nikisweeting]

passion != positive energy, I know plenty of grumpy passionate people.

Also you're thinking from the perspective of the customer, not from the perspective of the people who have to work with that surgeon every day. As a colleague of that surgeon, you'll probably enjoy working with someone who shows up to work enthusiastic about being there more than someone who shows up to work grumpy every day.

[tssva]

When it comes to co-workers all I care about is can I trust them to complete the tasks assigned them correctly, on time, and without inhibiting others from doing the same. I have worked with happy and grumpy people who could and couldn't meet those simple requirements, so I generally could careless about regarding happy vs grumpy.

[nikisweeting]

Then we are very different people. I would struggle to stay motivated in an environment where everyone is grumpy.