Well, to make a successful career in games, you've of course got to be good at your job. You need to be able to re-itterate work quickly, and positively and be resigned to the fact that sometimes you will have to change your work in a way that you may not be happy with. This happens a lot.
As for working in the industry, well for me, I'm kind of getting paid to do my hobby. Now that can't be bad can it?