Paris and New York for me. They don't appeal at all. Not just the amount of tourists but when I've seen of them on tv and videos they don't look attractive. I'm open to being told I'm wrong. I don't like London but would visit if I had to. I've been a few times for shows and sport etc. I always feel grubby after a visit.
I do like some cities. Favourites are Edinburgh and Barcelona. Barcelona is rife with pickpockets though so you have to be on your guard.
My ideal holiday is walking in the lakes but I still enjoy the odd city break.
So is there anywhere that is popular that doesn't appeal to you?