I couldn't go back to renting, tbh.
It's the same cost-wise as our mortgage is when you add council tax etc in, so it's not even a matter of saving money... but the uncertainty. I know a few people who have been handed a notice to leave as the landlord has decided to sell- I couldn't live with not knowing when my time 'might be up' on a long-term basis.
Similarly, a lot of the places I rented were dumps. Mould is easily hidden by fresh paint for the viewings then within a few months you see it in all it's glory. Things never getting fixed quickly. Their replacements being absolute shite. Not being allowed to decorate/paint so living with dated, ugly decor. Damp, so having to fork out for dehumidifiders for every bloody room.
Of course, you could rent somewhere actually nice, but I'd still miss having total control over what I do to my own home.
And, finally... landlords. I fucking hate them. I remember one year when I had just graduated from uni, a group of us rented a house in the student area from an old couple... they didn't fuck off for a good solid 4 months. Constantly making up excuses for why they needed to 'call in'. It was relentless. I lost my shit the day I came home and he was in my bedroom painting my wall and got paint all over my new tv. It came off, no harm done... but who the fuck starts painting someone's room without asking them/giving them a head's up a few days beforehand so they can move stuff out of the way to keep it clean?!
Nah, couldn't do it again. Owning a house has it's flaws too, but they're flaws I can better deal with.