My response is quite simple- health isn't about being skinny and sexy- it's about deciding to live or die. The ability to live to the fullest and having control of your body is how I'd categorise healthy. From my aesthetic, this entails a nutritionally balanced diet, excellent physical strength/ fitness and a body fat level that is not too high or low. I also say, this encapsulates a mental strength of independence/individualism. You should not listen to other people's opinions- as it's your only life, be selfish with it. If you desire to be a certain way, then be that way- whatever it takes to get there- and do what makes you happy.