Bruges is pretty but very expensive, and I've had some of the worst food I've ever experienced in Belgium.
Zanzibar is indeed lovely, and I've got a soft spot for Dar es-Salaam as well, although bits of it are very sad and run down.
Nothing bad has ever happened to me in Nairobi, but I still found it intimidating. Outside the city, I felt quite safe in Kenya.
Aleppo was lovely about 20 years ago - it makes me so sad to think about what has happened to it. An ancient city with some of the kindest, most welcoming people I've met, and delicious food could be had for pennies.
Cappadocia in Turkey is good fun and the rest of Turkey does have its nice spots, but overall I agree about the skeevy men and pushy sales people.
My favourite places in the UK are York, Liverpool and Warwickshire - Stratford, Warwick and Leamington are all lovely. Being in York or Stratford feels a bit like being on holiday. I know London is overpriced, overcrowded and dirty, but I can't help but get excited when I go there. So much to do and see.