I know many will disagree with me here but I found Las Vegas not really to my liking and I would not want to go back. It’s fine if you are a gambler, which I am not and the only thing left is eating, eating and eating. Perhaps if I was single, I might feel differently about it.
London, I always come back and leap straight in the shower, Its such a dirty place.
Sunderland, only place in UK we have parked and seriously worried about our safety and if our car would be there when we returned. That was back in the 90s it may have changed since then but back then it wasn’t nice.
I have been to a lot of places, mostly on business. So not generally touristy places. Many I would go back to and a few I wouldn’t.
Kayseri, central Turkey, is one. Limited food choices for western tastes but OK if you like sheep’s brain.
South Africa is another. I went there for a few months and it was different. Sections of the beach for whites only was a bit of an eye opener for me as an unseasoned traveller at the time. But the food was superb. I have been back since apartheid was dismantled. It not a safe place.
Libya was interesting but not a place I would go back to now. Not even sure I could.
Malta is another place I would cross of my list for the same reason I would avoid the Mediterranean resorts in Spain. They are over run with tourists and, in my view, have lost their identity.
On the other side of the coin, one of the most pleasant holidays we had was in the Trossachs in Scotland. We rented a holiday cottage there. And walked lots.
Used to love hastings but they’ve used it as a dumping ground for benefit claimants and refugees for years now it’s really spoiled the area. Used to be a retirement area few years ago and a place for family holidays. Not anymore, sadly.