Best thing about the job?
Waking up in the morning and still thinking to myself, "Yes, i get to fly today".
(I have been doing this for 15 years, I still love it.)
Coming across the Atlantic as the sun pops above the horizon. Early morning takeoff out of Innsbruck. Any time over the Grand Canyon. Or the Rockies. Or the Alps. Over whatever the mountain range in Turkey/Iran is called. (Or hearing the controller in Delhi saying "Contact departure, have a nice flight".)
The beuty will never cease amazing me, along with the sheer size of the world. Go fly through Russia, and then think about all the enviro-nazis saying we are destroying the world. Out there you can see how insignificant we are.
Enjoy the ride.