Not my cup of cake
I have to take issue with the suggestion that Vettel had it easy for all 4 of his titles. Two (2011 and 2013) of them I will grant you, his car was the class of the field but in 2010 Alonso was leading the championship until the last race and in 2012 both McLaren and Ferrari pushed the Red Bulls really hard. In those seasons he took the title in the last race and won by 4 and 3 points respectively. Hardly domination, and it's not Vettel's fault that Webber was a no mark so offered no real competition in the same car.