Everyone at the office is actually quite nice and polite, which makes for a great work environment. However, as always, there is this ONE guy. He walks in no good morning, howay doin'...nothing. Just that expressionless drone look!
I think people expect you to be polite, and god forbid if you don't walk in the office with a happy face, oh no, you are concidered rude, not a team player, etc, all sorts of names. I guess you can try to at least put on your happy mask to avoid the questions such as "What's wrong with you?".