Hello Tweetle,
Although some of the previous views are very common to hear, it depends on who is speaking. A sweet little girl wouldn't sound "männlich" or aggressive when speaking German for example.
I have heard many contradictory views about that one,however I think listening to music sounds better in Spanish or French than it is in German for a reason I don't know exactly.
Some don't really like the sound of German.They would say it's too harsh reminding them of Hitler roaring at an audience. Apparently some historical events seem to shape the way people perceive even the sound of a language. Like French reminds of love ,it is rather soft and feminine, Italian of beauty and sunshine while German of course is harsh. There must be partly a misconception in those views I guess.
It depends also how you got exposed to the language ,certainly if you listened to Rammstein's songs you will think German sounds nothing but powerful , harsh and scary even;)
However one objective reason why German might sound harsh is the fact that is has an overwhelming proportion of "ch" * with a peculiar sound* and "sch".It could sound as well guttural and lyrical.
Despite all that it is still in the ear of the beholder ;)