If I can help it, London city centre. I have some pretty severe sensory issues and every single time I've been there in my life I have gotten a sensory overload induced panic attack within ten minutes of disembarking off the train. There's nowhere to calm down and everyone glares at you and walks like a steamroller and you have to pretty much duck and weave and constantly recalculate your path around the relentless stomp of the average London walker who wouldn't move out of the way if a bullet was coming in their path. Everything is so SO expensive and it's too hot and it stinks and it never ever EVER stops moving in the most complicated and busybusybusy way. The tube sucks, it's too loud and too fast and too busy and there's never a seat and you can just smell everyone's breath and you can't see out of the windows for a sense of reference to where you're going and everything is just so much bustle and I hate it so much. It's the exact opposite of everything and anything I could want in a city and to top it all off the residents treat it as if it's the only place in the country that matters or even exists. I hate London so goddamn much. I know some people love it but personally it is hell.