The main positive is (assuming work is out there) it is mercifully bullsh*t free in terms of paperwork and management meddling, although that will tend to pile up with longer term assignments. Planning may also feature more heavily if you go back into Primary. As a daily supply teacher you're paid by the hour so when the day ends so does your workload - in theory. If you can afford it, part time working has its advantages too. No more superfluous meetings and pointless INSET days with endless bloody Powerpoints either. I quite like the variety of working in lots of different schools after spending many years in just one. I also like working in different subject areas to the ones I'm already familiar with. Apart from Drama. Drama cover lessons suck. If you do the job properly and get regular work in a few schools you can build up a positive and relaxed relationship with the students, who often seem quite relieved that they've got a Supply who knows what to do, and they will welcome your return. It's a good job if you want to do it - I just wish there was more work for all of us and the rate of pay wasn't declining.