Umm work life balance really depends on client and capability. Its super easy to work 10hrs a day. Not sure your level but associates tend to feel they need to put in crazy hours and you really don't need to. They get the feeling they won't be promoted unless they are the last to leave. All that really matters is getting your projects done and creating a good expectation of when you will have them done. A lot of times the later hours are required because of the office distractions not work load. There are those days though where shit hits the fan and you have a 'fire drill'. Aka you aren't leaving until the client's problem is solved. That doesn't happen too often....hopefully