A lot:
You don't
fall in love- less drama in life.
You don't need to make happy to anyone.
Somebody is
trying to humiliate you? - You don't give a f***
Friends
forgot your birthday? - Never mind, they still are your friends
Somebody is
trying to please you for his own good? - Never falling for that trap
Somebody is
showing off his lavish lifestyle to make you jealous?-just ignore
Apart from this you get rid of unnecessary obligations.
In short life becomes easy
and blissful