Beautiful Small City with Tons To Do
The Altstadt was beautiful, had a nice atmosphere, and had a fair number of people at night even in the winter. There are lots of great restaurants at various price ranges, many affordable. Salzburg is great if you like Mozart as he was born in Salzburg and lived there for a time. Both his Geburtshaus (birthplace) and Wohnhaus (apartment) can be visited, and there is a museum dedicated to him as well (the Mozarteum). There are also lots of Sound of Music filming sites in and around the city.
Insider Tip:Go during Mozart Week! Also, the Mozartkugeln are not to be missed. If you have time, check out Festung Hohensalzburg.