Which traveler are you?
If you are anything like me you cannot stand to have others in your personal space. So if they are touching you and the heat from their breathing can be felt on your face, you just must might need to spend the extra “moola” on a first class seat. If you are comfortable enduring some time very close to a stranger who may smell a little funky, may drink too many alcoholic beverages, or simply enjoy sleeping on your shoulder then by all means go with the economy. At the end of the day you are either the type of traveler to only travel first class when your sky miles permits or you would fly first class or not fly at all. Are you willing to spend the money on every trip to fly first class simply for comfort or is that a luxury you would rather live without?