You should be able to customize folders by giving them a picture

[Valdeforssmar]

You should be able to customize folders by giving them a picture.

(now that is only avalible for playlists), And for those hardcore listeners with more than 100+ playlists, it is essential that also the 'folders' (sv mappar) can also be customized with picture

[leonyl]

I came here to suggest the same idea, it really is frustrating and disappointing how inefficient and underdeveloped the folders feature (which has huge potential) really is.

The inability to customize and create folders from your phone is also beyond my comprehension.

On the desktop app, I would also like to see a 'main window' for your library and not only on the left pan as currently. When you press the page back button on your mouse inside the library, it should also take you out of a folder and not back from the main window. 

Overall the entire feature would need a huge overhall.