Porto Fira was the best decision for my honeymoon. I got married in December, and wanted to honeymoon immediately after. Greece has always been my dream honeymoon and as opposed to everyone's well intentioned advice, my wife and I decided to venture to Santorini in its lowest season. I must say I have no complaints at all, because we enjoyed relatively less crowds and surprisingly decent weather too. Porto Fira was one of the few hotels that was open in December and also met our requirements. Its location is breathtaking and we never got enough of the view despite spending 5 days here. The approach is a little challenging due to the sharp descent, so I do advise you take a hotel provided pickup.