Gärdet. Gröna Lund. Mikael Persbrandt. Good ice-cream and (mostly) horrible communal traffic.
The highest density of musicianship in the world.
Being a band not submitted to the current trends is not hard in Stockholm - it's very hard. The reason simply being that everyone, and I do mean EVERYONE, plays music. And when everyone has a band, who would give a fuck about yours?
Stockholm is probably the only capital where "I'm in a band" is probably a more failure-capable pickup line than "Wow, it must hurt when you fell from the sky".
(Even "A big strong one and a date, please." generated more of a smile than that the last time I tried picking up girls at bars, haha)