Now, by far the best and the worst thing about the job is the stress. You stop sleeping, spend all your time running battle plans and strategies over in your head, you second guess yourself 20 times a day, you damn near pull your hair out because someone else (or if a company potentially hundred of someone elses) livelihood reputation and ability to make money is on the line. It eats away at you and some people go mad, get burn out and go off to sell cakes online.
But when you win, or even when you feel the balance shifting in your favour then it is the best thing ever. You've fixed something for someone all the nightmares fade and you just feel good. For all of 5 minutes until the next disaster lands on your desk.
But it is so worth it.