Hello aspirant,

All profession in the world is the best in its place. You can't judge any job which is bad or good.

And the meter of toughness, is wholly depends on you if you didn't find any interest what you are doing it will fell toughest for you but one who finds the same work interesting, for him the job is the easiest one.

But according to people some of the jobs need more dedication other than others; like

>> Astronaut

>> Firefighters

>> Military

>> Surgeon

>> Pilots, etc.

Hope it helps you..

Best of luck..