Opinions are like assholes, everybody has one. Hell, this asshole has a whole website full of opinions. Most of the water in the ocean of others’ opinions doesn’t matter much; everyone has their biases and reasons for them. Some people will always prefer Coke, some will always prefer Pepsi – although I do believe the latter are dealing with some sort of physical impairment regarding taste perception.
The time when the opinions of others seem to weigh on us the most, though, is when our self-assurance is at its lowest – when we are 51% sure about a decision we’ve made. When we’re still fighting a battle in a search for truth in our own heads, the flippant observations of others affect us significantly more than when we’ve left any doubt behind.