Before this moves into the sticky and to save you some time I will add my bit because I'm feeling benevolent.
Despite the days when you will be immensely p1ssed off with your job and will whinge like a good 'un with the rest of us we would probably all admit (certainly in my part of the world) that we love what we do and wouldn't actually change it for the world. We always point out to each other that even the richest guys in the world don't get to roar around in fast pointy jets on a daily basis (yes I know they have plenty of other perks!).
The general theme is that you will love the flying but you will hate the bullsh1t that comes with the job.
Hope that helps.
BV