I have a few places that I have travelled to that I want to return to.
I only spent a few days in New Zealand, in the northern island, but it left me craving for more. The landscape is wonderful, so green and lush. The wildnerness reminded me a little of Australia, but less barren, cooler, greener, more fertile, and younger. I really want to visit Middle Earth (the southern island), as the Lord of the Rings / Hobbit are my favourite books (and made into such good movies with incredible location shots from around New Zealand).
I have spent quite a bit of time in Japan, both as a tourist and a worker. While I wouldn't want to return and live/work there, as a tourist I love it. My favourite place is Nikko, in Tochigi prefecture. Again, it is completely picturesque throughout the year, although the main shrines are quite expensive to gain access to. The 'wild' areas around the shrines are wonderful to hike and ski through, and the waterfalls are beautiful.
I also want to visit Kakunodate (a small town near Morioka in the north of Japan), Kyoto, Hirosaki (far north on the main island), and Hakodate again. I didn't spend enough time there to experience the foods, take in all of the sights and hike through the surrounding areas.
I leave it a few years before I return to Japan - for reconstruction to continue, services to resume, and the food situation to stabilise and become clearer (a lot of fruit / rice available comes from Fukushima prefecture, and the foodstuffs grown on the east coast often has unsafe radiation levels). But I certainly will return - it's a stop-over between my current country and my family.