I didn't even work during undergrad CS and that was the most stressful point in my life. I easily put in 40-50 hours a week between classes, studying, problem s

I didn't even work during undergrad CS and that was the most stressful point in my life. I easily put in 40-50 hours a week between classes, studying, problem sets and projects. The months before, during and after interview season were the worst. I had to add 10 hours a week to study 1-2 months beforehand. Then during the interview season, I had to miss classes to go on 7 hour east to west coast flights, with return flights landing at 3 AM local time. After the interviewing season ended, there were mountains of work from missing classes and neglecting school work. Now it's 10 AM - 7:30 PM (including meal time, I never eat at my desk) with free breakfast, lunch and dinner with no deadlines to worry about. During the undergrad years, I was studying by memorizing the answers to all permutations of a problem because of stress and multiple deadlines a week, but now I have the time to understand the how's and why's of the questions and answers. Also the money that can effectively be used buy time is nice. I can afford to pay people to fix my toilet/unclog my sink/build IKEA furniture/etc. and have the money to order grocery delivery/drop-off laundry/take-out/etc.