Someone who gets to study in a rich school sometimes don't want to study,

someone who has desire to study they don't get education due to situation,

Someone who has a high paid job wants to take a break and someone who has no/less salaried job wish to get it,

Someone who lives with all luxuries want to stay in nature and someone who already surrounded with nature want to take advantage of luxuries,

Someone who stays in metropolitan city want to settle at country side and who are living there want to settle down in city
Someone who travels by own vehicles like car wish to take a train journey and someone who is traveling by train wish to travel by road.

That's Life 
Someone desires someone else's life

Sometimes we wish to have someone else's life and mean while someone may wishes to have our life....