I wouldn't use any of those. Don't even mention the hours, work life/balance or kids. Always try to turn things into why you're the best person for the job. It should make so much sense to hire you they'd feel stupid not to! Saying something positive about the company also makes them feel better about themselves, which causes the interviewer to associate you with all those good vibes. Don't bad mouth your current job, don't seem too eager to leave.
Granted I haven't interviewed for terribly many jobs, but the ones I have interviewed for took between 20-40 interviews, and if one person didn't like you you're out, so I do have some experience.
I'd go for an angle like this:
While working for a non-profit I saw that if you truly want to get things done you'll have cooperate closely with the local authorities, and through this experience I found the public sector to be a better fit for me, as I'd like to effect change (I dunno what kind of non-profit you're working at) from the public sphere due to x,y,z (maybe mention something about the government having more influence or whatnot, something to make the interviewer feel good about themselves) using skills a,b,c which I've gained by working on (mention one or two examples) projects at my current job.