I kinda have this headcanon that the Medic, from TF2, is a night person, meaning that's the time that he has for doing research and improvments on his weapons. With that in mind, I bet that he never gets enought sleep and is extra-grumpy in the mornings, meaning that his teammates avoid getting near him after his 3rd cup of coffe, or untill he's fully cloathed and ready for battle.
