EricatNordic, your a forum all your own, there's a lot to tease out from your comments. You've gone into your job with a buzz for the challenge and the hours/financial responsibility is in second place. And at the cross road, which way should you go. I understand that. A lot of the comments here are very practical, hard experience and culturally-based. When I say that, you are talking about the baby boomers who are still broke and resentful of the long hours on the treadmill to nowhere.
Trust your own instinct. It will be a different world for the next generation. I believe my professional challenge is to make engineering an exciting proposition as a career. I think there is still a world of change yet to come anyone obsessed with hours will not be winners. I only have to remember how I came to the profession in the days of slide rules, razor blades on film, calligraphy competitions and lunchtime boozing, crikey did we work crazy hours! We loved it, it was the team. Compared to todays endless silent sea of computers, hermetically sealed cubicles and sanitised water, the 40 hours are a struggle!
Your question, is when have you arrived? When can you step off and just do straight time? You never will arrive and you will never do straight time, you're not a clock worker, you're goal-driven. Your experiences are invaluable and will go a long way to learning how to develop people.
When I engage engineers, I emphasise the training, the expectations and the development work. Money and hours are secondary. If these are the key requirements with little interest in the greater issues then it is not the best match.
Referee, I have learned now that as much as engineering problems are still interesting, I have to spend more time with people and team-building. Focus on a vision and sell it. Pay them for for the hours regardless and measure the productivity, work with them to increase the value using their ideas, not yours. If they own the solution, they'll look after it. With my team of engineers they learn I work for them, not them for me and they know it. People are your greatest assets, they'll take care of the hours, if you have a vision.