I love Dusseldorf, because:
so many people come together here from all over the world - a true melting pot of cultures paired with Rhineland cheerfulness.
My favorate tips for Dusseldorf are:
a trip to the lake, Unterbacher See, where you can enjoy nature, rent a romantic paddle boat or take a surfing lesson. Evenings, I recommend the Zakk in Flingern. There are neat things there for the ears, beyond the charts and mainstream music.