I've been using Spotify for the past 9 years and have built up quite a collection of playlists and music.
I am more than happy to create a new account and transfer everything to it, this would however take me about 3 days, and I just don't have the time to spare, if a direct username change is indeed possible.
I've been debating changing my username for the past 2 years, as I created when I was quite young and it seems a bit childish now. It's also associated with some fairly bad memories, which may seem futile, it's one of the main reasons I want to change it though.
The ideal outcome I'm looking for, is my current account with the username changed so that I can keep the information associated with the account on my account, the date I joined; and of course all of my playlists (about 150)