We live for ourselves or for society ?

The way we act,we eat,we dress depends a lot on the people around us.....so i always had a doubt are we doing all this to present ourselves in a good way to ppl around us or are we trying to get attention of people around us ???

To start off with a simple example when a plate of biryani is placed on your table at a restaurant wats da best way to eat it ? hand or with the cutlery they provide ?answer should be obviously hand but still we still pick up the cutlery they provide and eat. why?? Is it because our hands will get dirty ? Or is it because we want to present ourselves in a good way to the society ? Or  is it because people around should not think you as uncivilized ?

People say the best way to live is to do things which please you but we restrict ourselves while doing many things only to please the people around us and we ending up being unsatisfied. How many people say no to this ?

So now what should i do ? Should i do things which please me ? or should i do things which please people around me ? I think the best way is to do thinngs which please us until it hurts peoples feelings or people it self :P