The workplace culture can very. I have seen some people work minimum hours and enjoy life. Where others are obligated to work their life away. For the most part, employees have a decent work-life balance.
My experience at Raytheon has brought me back to some wisdom I received as a new engineer. I was told "I would rather have a good manager/supervisor than have a sexy title".
Hardest part of the job is the fact that in a large company, politics will always dominate over good hard working ethic.
Most enjoyable part of the job is the products that you get to work on. It's good to know that you help the warfighter.