While the city is a great place to see the lights, it also has plenty more to offer so you can really pack your trip full of fun excursions. You can see filming locations of Game Of Thrones, go to the geothermal spa, or check out the Phallological Museum.
The people of Tromso are lovely and welcoming, greeting you on the street and responding to your poor attempts at speaking Norweigan with a smile and response in perfect English.
While the main part of town is down at sea-level, the rest of the town builds up behind it on some quite steep hills and many unsealed/uneven roads. This can be slightly treacherous in winter so best to have shoes with substantial grip and don't take a wheeled suitcase if you're staying out of town and up a hill - it will be quite a workout!
The Kakslauttanen Arctic Resort offers a unique way to view the Northern Lights. Glass igloos (which include a toilet and bed) let you sleep under the lights with a full view of the sky.
There aren't many hostels, so it can be difficult for backpackers and budget travelers to find affordable accommodations. However, there is a fairly active community on both Couchsurfing and AirBnB.
If you enjoy outdoor winter activities, Nunavik has plenty to offer. There isn't much in the way of guided tours, so you have to be willing to do some independent adventures.
There is plenty of fishing and hiking, lots of chances to get out on the water, and plenty of wildlife to see. You can get a feel for the activities in Nunavik here.
There is only 12,000 people living in Nunavik, an area of 443,684.71 km2 . Communities are isolated and spread out, and the only way to get to Nunavik is by air (there are no roads connecting Nunavik to southern Quebec).
There are very few tours/packages available and limited accommodations, so you have to be willing to really plan out your trip and look after everything yourself.
Svalbard is home to less than 3000 people. Being such a small community, there are very little options available for travelers (for example, there are only a few hotels to choose from).