Goodness, what a question! SO MANY possible places, and you don't mention budget, and a possible language barrier?
If you want sun, well, Spain is very civilised, and the Portuguese actually still quite like us! So do the Dutch, but their weather is quite like ours, though the country is at least well-organised and sensible.
Italy has a lot going for it, if you can master a little of the language? If you have a very big budget, then Denmark perhaps, or one of the other Scandi countries, but the further north you go the winter daylight issue (or lack of it) becomes a problem?