I'm another one who has worked as a cleaner (when Son was little), but whose house isn't great. When I have a free Saturday, I 'hire myself' for three hours - I always was able to do a house in 3 hours. But I have a very active social life!
It's all tidy, and I vacuum every day, so I'd have no problem with an unexpected visitor. But that's because I don't believe the odd dusty room is a major problem. My living room, bathroom and kitchen are always clean - everywhere else less so, and I've just cleaned a major amount of dust from my bedroom during today's three hours!
However, I've just sat down and can see my living room radiator is dirty where the cats have been jumping on the window sill. Dunno when I'll get around to that..... That's the thing I need to work on - see it-clean it. (No motivation)
My entire house could do with a deep clean, although I do deep clean each room about once a year.
I listen to podcasts as I clean, to make it fun/educational - I don't hate cleaning (although it is never going to be the joy that ironing is).
I clean out the car and do a 'home car valet' before every holiday or weekend away, so it's usually anywhere on a scale from 'pristine' to 'clean'. I don't allow eating in there. Other people's cars sometimes horrify me - but I can imagine my house would horrify some people (not convinced I've ever cleaned a skirting or dado more than once a year).
I'd hire a cleaner if I could afford it, but I was a bloody good cleaner, and not many are up to that standard, so I'd be a nightmare to work for.