I have experienced it and witnessed it in others. I'm not talking about those places you've added to your list after seeing your friends' Facebook posts or reading article after article about it as the place garners more touristic attention. What really fascinates me is that inexplicable "oh!" that prefixes the name of a place when you talk about it longingly, while somewhat unsure of how it ended up achieving "dream status" with you. Mine have always been (in no particular order): Istanbul, Croatia, Sardegna, Prague, Sicily, Malta, Chicago, Prince Edward Island, Curaçao, Granada, St-Petersburg, Egypt, Morocco, Cyprus, Corsica, Corfu.
Corfu...
Here's a sneak peak of just some of the newcomers to the collection.