You all knowhow important breakfasts are; not only because it supplies you with energy for the whole day, but also, because it prevents you of morning grumpiness and it is fun! 

Berlin is the city for having breakfast, I would say. During the week almost every cafe/restaurant offers at least a decent breakfast and on weekends you have plenty of buffet places, where you can have a huge brunch with scrambled eggs, ham, cheese, hummus, salads, meats and a lot more for 8-12€.