I found that working full time completely took over my weekend. There was no way I could visit relatives for the weekend, or go anywhere as I had work that took up at least one day, if not more. It impacted hugely on our family time, caused untold stress and guilt and made me miserable, tired and resentful. I requested 4 days with the express intention of getting a weekend back. I fully expected to work ALL day on my day "off", which I do, but I make sure I have a work-free weekend, every weekend, both days, no debate. It that has transformed how I feel about the job.
I appreciate that I'm lucky in that I have primary-aged children, so once I've done the drop off (which is sooo good, being back in social contact a little bit with other mums, touching base with the kids teachers occasionally) I can come home and work without interruption. I also accepted the fact that as a primary class teacher doing 4 days, I do the bulk of the work for my year group. My 0.2 job share does discrete stuff on her day, and I try to cram everything else into my 0.8. I do all SEND stuff, organise class room management and displays, interventions, assessment, data, parents evenings etc etc, but it keeps me in control, so it's my choice. I don't think I could go back to full time now. Seriously.