I might be unusual, but I find I get a pretty good work/life balance.
I rarely mark anything. Pretty much only the CARS and PAT tests and pre and post assessment for maths. I have made up tracking sheets in Google Docs for each subject that lists all areas of the curriculum that the children need to demonstrate in that topic. I carry around an iPad all of the time, and when I'm moving around the students I look at their work and see if they can show whatever it is I'm looking for. I put the date in the spreadsheet when they have shown that aspect of the curriculum. I also type in quick notes "off task", "absent", "needed teacher support", etc, just whatever makes sense to me.
For writing, I work through my students by conferencing with them whilst they are working. I'll call one over at a time with their book and we'll go through their writing together. I'll make some notes about what they have achieved, what they need support with, and then we set their writing goal together and they write it down in their book. I usually get through each student once per week.
Come report time, I just look through the spreadsheets and see what they have mastered.
I get to work at 7am, and leave not long after the bell if I don't have a meeting. I do tend to work through recess and lunch (by choice), but I make sure that I'm not working between then and when my son goes to bed (and even then it will only be some organising or making notes), and I'll make sure that I have at least one day on the weekends where I do no work altogether. On the holidays, I make sure that I get everything organised as much as possible for the upcoming term. I basically plan out the whole term, so just have to tweak it as I go along. Don't reinvent the wheel - someone, somewhere has done every lesson you want to do and posted it online.
If leadership ask you to do something, then be realistic. "I won't be able to complete that until next Thursday. Is that ok, or would you like to assign the task to someone else?" or "Well if you need that by tomorrow, then I will need someone to take my afternoon duty to get it finished."