I know lots of people who have more than 15 days off, but it's true they are more senior. By the time DH retired a few years ago, he had 5 weeks per year, and as he was in the financial industry, he was required to take at least some of it periodically (it's an anti-fraud regulatory requirement).
I think that one thing that is important to understand is that when the culture is different, attitudes are different. I have known very few people who actually hate their jobs, and many who are really happy in what they do. People like to work; most actually enjoy it.
DH and I have always had fairly intense time consuming jobs, but we also had flexibility to make time for family during the work day. We never missed a single school event because of work while our children were young. Also, generally speaking, children don't go to bed nearly as early in the US as they do in the UK. So we spent time with them in the evening as well and always ate together. We took one longish family vacation in the summer and lots of short breaks as well. (We live in Florida and did not have to go far for things to do that the whole family enjoyed.)
I'm well past retirement age (just turned 70) and still working because I love what I do. I have cut back to part-time, similar to what KickAss described in an earlier post (thought not in teaching). I hope to keep on going for a few more years.
Also, an observation about Suits: they may be staying late at the office, but they are often not working. They are plotting, planning to plot, de-briefing plots, and doing lots of chit chat in between long swaths of swanning around in designer clothes.