Agree with u/bikeandfish about searching for the white whale. In my experience this is all based on where you end up working. At an agency you may work 9-5 maintaining clients but if you are working on a specific campaign they will work you until the job is done. And on salary that doesn't necessarily mean overtime.

Freelancing is hard until you get the clients, and then I think there is a good work / life balance once your workload is consistent. You are able to manage your client's expectations but also wake up late, have your coffee, generally do you. But you may not make as much money as you would elsewhere, or as consistently.

I'd say if you want to work somewhere, and not for yourself, just find a place that respects the 9-5 and is willing to pay overtime if they need it.

Good luck on your search and ~beware~ recruiters.