Depending on which speciality your in, you get to travel, learn a whole lot of different skills or become a pro in one specific job.
The hardest part for some is being far from home for a long while sometimes in countries that are at war.
The most enjoyable part is to be able to change from one job to antother, from one place to antother. To meet a lot of differnt people.
We can do a lot of different sports every day during working hours.