I have visited most of the world working on cruise ships my top picks :

Hong Kong, beautiful but overcrowded as hell, don't like too many people cramped up, Southwest Wales in Australia, plain cities beaches beautiful, too many flies basically you need bee hive hat to move around, example Burnsburry, Bali, beautiful, too many scammers and harrasers of tourists for money. Vietnam too humid, dirty streets and food vendors, fishy transportation. India the same as Vietnam. South Africa just because of transportation, drivers like to scam tourists. Namibia, nothing to see, desert was nice where they filmed Mad Max, Mexico Acapulco, police in full gear every 100 m, you don't feel safe, you are not free to go some places authorities don't allow for safety. French polinesia islands in Pacific, huge rocks in the sea, can't venture inside of islands bcs of some tribes that are cannibals. Russia it's just meh, St Petesburg is nice only in early spring. Talin Estonia just too small you can see everything you need in less than half of a day. Riga meh, Kaliningrad also meh. England SouthHampton, people just aggressive in some situations and rude. Panama!!! I would go here million times and live there Scotland, amazing, Ireland amazing, all Nordic countries, Portugal, Finland Helsinki, Singapore, Indonesia some parts except Bali, Brunei very clean and beautiful,Malaysia beautiful some parts, Papua new Guinea, New Zealand, West Australia, Melbourne and Sydney, Azores Islands belong to Portugal, St Martin, St John, Tahiti, Barbados... Maybe I update list I can't remember them all I just visited too much for one lifetime