I love when people turn up unexpectedly. If I'm busy cooking, I'll sit them at the island with a drink and chat whilst I carry on cooking, and offer them something to eat.
If I'm cleaning, I'll stop. My world won't come to an end if the cleaning isn't done, and I would be heartbroken if I'd turned someone away, or refused to answer the door, and something awful happened to them later and I had lost the chance of a last chinwag with them in favour of a clean(er) home.
If the house is messy - so what? They've come to see me, and not judge the standard of my home. And if they do want to judge - well, let them. It won't affect me either way.
I hate that this world has now become so insular and by appointment only. From reading posts on here, I would be very on edge if I was invited to someone's home, as I would be constantly worried that I was outstaying my welcome.
My closest friend and I are forever popping in and out of each other's homes, but I'm very wary of just going to see other friends on the offchance that they're in, just for a chat. If they didn't answer the door, I'd be worried they'd be doing the mumsnet commando crawl behind the sofa to avoid me.