What stage of your career are you at, OP? If you've not really started clinicals yet, I wouldn't recommend making any decisions too early based on this criterion alone. Yes, some specialties involve more antisocial hours work than others, but finding something you enjoy and are good at is also important. No point deciding on public health if you end up hating it.
Anaesthetics does have a relatively high on-call commitment, but still manages to be relatively family friendly, I think because the elective work is all sessional so it's easy to go part time without feeling that your patients are missing out on the days you're not there.